./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF --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 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:08:12,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:08:12,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:08:12,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:08:12,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:08:12,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:08:12,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:08:12,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:08:12,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:08:12,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:08:12,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:08:12,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:08:12,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:08:12,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:08:12,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:08:12,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:08:12,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:08:12,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:08:12,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:08:12,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:08:12,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:08:12,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:08:12,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:08:12,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:08:12,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:08:12,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:08:12,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:08:12,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:08:12,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:08:12,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:08:12,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:08:12,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:08:12,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:08:12,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:08:12,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:08:12,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:08:12,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:08:12,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:08:12,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:08:12,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:08:12,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:08:12,376 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:08:12,407 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:08:12,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:08:12,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:08:12,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:08:12,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:08:12,410 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:08:12,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:08:12,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:08:12,411 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:08:12,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:08:12,412 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:08:12,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:08:12,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:08:12,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:08:12,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:08:12,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:08:12,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:08:12,414 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:08:12,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:08:12,414 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:08:12,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:08:12,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:08:12,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:08:12,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:08:12,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:12,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:08:12,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:08:12,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:08:12,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:08:12,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:08:12,418 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:08:12,418 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:08:12,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:08:12,418 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:08:12,419 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_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37cccb3bf38aef2358990f5bb72c991902624e4b903b7b6aaef89921bb90a94d [2021-11-20 06:08:12,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:08:12,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:08:12,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:08:12,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:08:12,769 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:08:12,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2021-11-20 06:08:12,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/data/897201193/c180fc2186b94f68acb5922ba95cacda/FLAGcf360026b [2021-11-20 06:08:13,660 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:08:13,660 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/sv-benchmarks/c/eca-rers2012/Problem03_label44.c [2021-11-20 06:08:13,680 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/data/897201193/c180fc2186b94f68acb5922ba95cacda/FLAGcf360026b [2021-11-20 06:08:13,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/data/897201193/c180fc2186b94f68acb5922ba95cacda [2021-11-20 06:08:13,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:08:13,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:08:13,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:13,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:08:13,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:08:13,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:13" (1/1) ... [2021-11-20 06:08:13,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480ab25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:13, skipping insertion in model container [2021-11-20 06:08:13,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:13" (1/1) ... [2021-11-20 06:08:13,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:08:13,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:08:14,683 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_14733e8c-9409-4603-a531-be1b2108e024/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2021-11-20 06:08:14,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:14,744 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:08:15,022 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_14733e8c-9409-4603-a531-be1b2108e024/sv-benchmarks/c/eca-rers2012/Problem03_label44.c[58121,58134] [2021-11-20 06:08:15,035 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:15,057 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:08:15,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15 WrapperNode [2021-11-20 06:08:15,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:15,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:15,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:08:15,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:08:15,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,262 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-20 06:08:15,266 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:15,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:08:15,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:08:15,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:08:15,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:08:15,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:08:15,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:08:15,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:08:15,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (1/1) ... [2021-11-20 06:08:15,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:15,468 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:08:15,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:08:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:08:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:08:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:08:15,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:08:15,671 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:08:15,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:08:17,967 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:08:17,979 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:08:17,980 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:08:17,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:17 BoogieIcfgContainer [2021-11-20 06:08:17,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:08:17,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:08:17,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:08:17,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:08:17,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:08:13" (1/3) ... [2021-11-20 06:08:17,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bc6157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:17, skipping insertion in model container [2021-11-20 06:08:17,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:15" (2/3) ... [2021-11-20 06:08:17,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bc6157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:17, skipping insertion in model container [2021-11-20 06:08:17,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:17" (3/3) ... [2021-11-20 06:08:17,993 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label44.c [2021-11-20 06:08:18,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:08:18,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:08:18,062 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:08:18,070 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:08:18,071 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:08:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-20 06:08:18,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:18,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:18,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash 302925243, now seen corresponding path program 1 times [2021-11-20 06:08:18,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:18,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696542757] [2021-11-20 06:08:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:18,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:18,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:18,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696542757] [2021-11-20 06:08:18,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696542757] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:18,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:18,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:08:18,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373728995] [2021-11-20 06:08:18,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:19,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:19,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:19,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:19,049 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:20,561 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2021-11-20 06:08:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:20,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2021-11-20 06:08:20,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:20,587 INFO L225 Difference]: With dead ends: 855 [2021-11-20 06:08:20,587 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 06:08:20,593 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 [2021-11-20 06:08:20,598 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 119 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:20,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:08:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 06:08:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2021-11-20 06:08:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2021-11-20 06:08:20,684 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 177 [2021-11-20 06:08:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:20,685 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2021-11-20 06:08:20,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2021-11-20 06:08:20,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 06:08:20,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:20,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:20,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:08:20,693 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2005485845, now seen corresponding path program 1 times [2021-11-20 06:08:20,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:20,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598350935] [2021-11-20 06:08:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:20,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:20,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:20,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598350935] [2021-11-20 06:08:20,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598350935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:20,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:20,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:08:20,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003193292] [2021-11-20 06:08:20,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:20,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:20,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:20,902 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:22,061 INFO L93 Difference]: Finished difference Result 1342 states and 2082 transitions. [2021-11-20 06:08:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:22,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 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 182 [2021-11-20 06:08:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:22,070 INFO L225 Difference]: With dead ends: 1342 [2021-11-20 06:08:22,071 INFO L226 Difference]: Without dead ends: 885 [2021-11-20 06:08:22,073 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 [2021-11-20 06:08:22,075 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:22,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 181 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:08:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-11-20 06:08:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 880. [2021-11-20 06:08:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.4687144482366326) internal successors, (1291), 879 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1291 transitions. [2021-11-20 06:08:22,145 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1291 transitions. Word has length 182 [2021-11-20 06:08:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:22,145 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1291 transitions. [2021-11-20 06:08:22,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1291 transitions. [2021-11-20 06:08:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 06:08:22,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:22,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:22,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:08:22,152 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:22,153 INFO L85 PathProgramCache]: Analyzing trace with hash -23446020, now seen corresponding path program 1 times [2021-11-20 06:08:22,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:22,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516870445] [2021-11-20 06:08:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:22,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:22,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:22,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516870445] [2021-11-20 06:08:22,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516870445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:22,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:22,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:08:22,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143301986] [2021-11-20 06:08:22,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:22,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:22,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:22,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:22,310 INFO L87 Difference]: Start difference. First operand 880 states and 1291 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:23,432 INFO L93 Difference]: Finished difference Result 2594 states and 3822 transitions. [2021-11-20 06:08:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2021-11-20 06:08:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:23,446 INFO L225 Difference]: With dead ends: 2594 [2021-11-20 06:08:23,446 INFO L226 Difference]: Without dead ends: 1716 [2021-11-20 06:08:23,449 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 [2021-11-20 06:08:23,451 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:23,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:08:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-11-20 06:08:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1696. [2021-11-20 06:08:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.4395280235988202) internal successors, (2440), 1695 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2440 transitions. [2021-11-20 06:08:23,517 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2440 transitions. Word has length 185 [2021-11-20 06:08:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:23,518 INFO L470 AbstractCegarLoop]: Abstraction has 1696 states and 2440 transitions. [2021-11-20 06:08:23,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2440 transitions. [2021-11-20 06:08:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-20 06:08:23,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:23,525 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-20 06:08:23,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:08:23,526 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:23,527 INFO L85 PathProgramCache]: Analyzing trace with hash 372513201, now seen corresponding path program 1 times [2021-11-20 06:08:23,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:23,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149533500] [2021-11-20 06:08:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:23,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:08:23,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:23,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149533500] [2021-11-20 06:08:23,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149533500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:23,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:23,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:08:23,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508896842] [2021-11-20 06:08:23,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:23,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:08:23,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:08:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:08:23,880 INFO L87 Difference]: Start difference. First operand 1696 states and 2440 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:25,222 INFO L93 Difference]: Finished difference Result 3531 states and 5130 transitions. [2021-11-20 06:08:25,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:08:25,222 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-20 06:08:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:25,236 INFO L225 Difference]: With dead ends: 3531 [2021-11-20 06:08:25,236 INFO L226 Difference]: Without dead ends: 1663 [2021-11-20 06:08:25,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:08:25,253 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:25,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 47 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:08:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-11-20 06:08:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1663. [2021-11-20 06:08:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 1.325511432009627) internal successors, (2203), 1662 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2203 transitions. [2021-11-20 06:08:25,325 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2203 transitions. Word has length 192 [2021-11-20 06:08:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:25,325 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 2203 transitions. [2021-11-20 06:08:25,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2203 transitions. [2021-11-20 06:08:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-20 06:08:25,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:25,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:25,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:08:25,333 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash 146400972, now seen corresponding path program 1 times [2021-11-20 06:08:25,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:25,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904336771] [2021-11-20 06:08:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:25,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:25,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:25,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904336771] [2021-11-20 06:08:25,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904336771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:25,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:25,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:08:25,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822226199] [2021-11-20 06:08:25,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:25,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:08:25,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:25,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:08:25,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:08:25,794 INFO L87 Difference]: Start difference. First operand 1663 states and 2203 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:27,306 INFO L93 Difference]: Finished difference Result 4323 states and 5743 transitions. [2021-11-20 06:08:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:08:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 208 [2021-11-20 06:08:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:27,324 INFO L225 Difference]: With dead ends: 4323 [2021-11-20 06:08:27,324 INFO L226 Difference]: Without dead ends: 2488 [2021-11-20 06:08:27,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:08:27,332 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 195 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:27,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 94 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 06:08:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-11-20 06:08:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2487. [2021-11-20 06:08:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.3085277554304102) internal successors, (3253), 2486 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3253 transitions. [2021-11-20 06:08:27,411 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3253 transitions. Word has length 208 [2021-11-20 06:08:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:27,412 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3253 transitions. [2021-11-20 06:08:27,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3253 transitions. [2021-11-20 06:08:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-20 06:08:27,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:27,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:27,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:08:27,427 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -459963951, now seen corresponding path program 1 times [2021-11-20 06:08:27,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:27,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602092524] [2021-11-20 06:08:27,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:27,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:08:27,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602092524] [2021-11-20 06:08:27,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602092524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:27,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:27,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:08:27,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183330980] [2021-11-20 06:08:27,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:27,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:27,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:27,616 INFO L87 Difference]: Start difference. First operand 2487 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 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) [2021-11-20 06:08:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:28,624 INFO L93 Difference]: Finished difference Result 7433 states and 9727 transitions. [2021-11-20 06:08:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:28,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 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 210 [2021-11-20 06:08:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:28,657 INFO L225 Difference]: With dead ends: 7433 [2021-11-20 06:08:28,658 INFO L226 Difference]: Without dead ends: 4948 [2021-11-20 06:08:28,662 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 [2021-11-20 06:08:28,663 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 206 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:28,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 62 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:08:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2021-11-20 06:08:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 4937. [2021-11-20 06:08:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 1.2884927066450567) internal successors, (6360), 4936 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 6360 transitions. [2021-11-20 06:08:28,817 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 6360 transitions. Word has length 210 [2021-11-20 06:08:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:28,819 INFO L470 AbstractCegarLoop]: Abstraction has 4937 states and 6360 transitions. [2021-11-20 06:08:28,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 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) [2021-11-20 06:08:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 6360 transitions. [2021-11-20 06:08:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-20 06:08:28,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:28,833 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:28,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:08:28,833 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:28,834 INFO L85 PathProgramCache]: Analyzing trace with hash -145510537, now seen corresponding path program 1 times [2021-11-20 06:08:28,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:28,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341432951] [2021-11-20 06:08:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:28,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:28,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:28,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341432951] [2021-11-20 06:08:28,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341432951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:28,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430474682] [2021-11-20 06:08:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:28,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:28,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:28,986 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:28,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:08:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:29,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:08:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-20 06:08:29,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:08:29,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430474682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:29,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:08:29,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906461354] [2021-11-20 06:08:29,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:29,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:29,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:29,992 INFO L87 Difference]: Start difference. First operand 4937 states and 6360 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:30,996 INFO L93 Difference]: Finished difference Result 9884 states and 12740 transitions. [2021-11-20 06:08:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 215 [2021-11-20 06:08:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:31,031 INFO L225 Difference]: With dead ends: 9884 [2021-11-20 06:08:31,032 INFO L226 Difference]: Without dead ends: 4949 [2021-11-20 06:08:31,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:31,041 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 47 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:31,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 307 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:08:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2021-11-20 06:08:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 4937. [2021-11-20 06:08:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 1.2710696920583469) internal successors, (6274), 4936 states have internal predecessors, (6274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 6274 transitions. [2021-11-20 06:08:31,213 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 6274 transitions. Word has length 215 [2021-11-20 06:08:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:31,214 INFO L470 AbstractCegarLoop]: Abstraction has 4937 states and 6274 transitions. [2021-11-20 06:08:31,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 6274 transitions. [2021-11-20 06:08:31,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-20 06:08:31,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:31,232 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:31,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:31,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:08:31,446 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash -71775401, now seen corresponding path program 1 times [2021-11-20 06:08:31,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:31,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579166929] [2021-11-20 06:08:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:31,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:08:31,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579166929] [2021-11-20 06:08:31,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579166929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:31,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730096815] [2021-11-20 06:08:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:31,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:31,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:31,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:08:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:08:31,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 06:08:32,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:08:32,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730096815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:32,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:32,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-20 06:08:32,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152379627] [2021-11-20 06:08:32,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:32,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:32,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:32,523 INFO L87 Difference]: Start difference. First operand 4937 states and 6274 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:32,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:32,864 INFO L93 Difference]: Finished difference Result 14805 states and 18816 transitions. [2021-11-20 06:08:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:32,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 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 232 [2021-11-20 06:08:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:32,930 INFO L225 Difference]: With dead ends: 14805 [2021-11-20 06:08:32,931 INFO L226 Difference]: Without dead ends: 9870 [2021-11-20 06:08:32,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:32,940 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 268 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:32,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 507 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:08:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2021-11-20 06:08:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9868. [2021-11-20 06:08:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9868 states, 9867 states have (on average 1.2677612242829635) internal successors, (12509), 9867 states have internal predecessors, (12509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9868 states to 9868 states and 12509 transitions. [2021-11-20 06:08:33,251 INFO L78 Accepts]: Start accepts. Automaton has 9868 states and 12509 transitions. Word has length 232 [2021-11-20 06:08:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:33,252 INFO L470 AbstractCegarLoop]: Abstraction has 9868 states and 12509 transitions. [2021-11-20 06:08:33,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 9868 states and 12509 transitions. [2021-11-20 06:08:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-20 06:08:33,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:33,278 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:33,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:33,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:33,494 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash -381195820, now seen corresponding path program 1 times [2021-11-20 06:08:33,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:33,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603331504] [2021-11-20 06:08:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:33,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:08:33,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:33,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603331504] [2021-11-20 06:08:33,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603331504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:33,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71538337] [2021-11-20 06:08:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:33,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:33,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:33,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:33,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:08:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:33,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:08:33,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 06:08:34,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:08:34,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71538337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:34,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:34,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:08:34,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879527339] [2021-11-20 06:08:34,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:34,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:34,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:34,416 INFO L87 Difference]: Start difference. First operand 9868 states and 12509 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:35,470 INFO L93 Difference]: Finished difference Result 28065 states and 35647 transitions. [2021-11-20 06:08:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-20 06:08:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:35,529 INFO L225 Difference]: With dead ends: 28065 [2021-11-20 06:08:35,529 INFO L226 Difference]: Without dead ends: 18199 [2021-11-20 06:08:35,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:35,550 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 42 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:35,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 342 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:08:35,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18199 states. [2021-11-20 06:08:36,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18199 to 18191. [2021-11-20 06:08:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18191 states, 18190 states have (on average 1.1650907091808687) internal successors, (21193), 18190 states have internal predecessors, (21193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18191 states to 18191 states and 21193 transitions. [2021-11-20 06:08:36,095 INFO L78 Accepts]: Start accepts. Automaton has 18191 states and 21193 transitions. Word has length 236 [2021-11-20 06:08:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:36,096 INFO L470 AbstractCegarLoop]: Abstraction has 18191 states and 21193 transitions. [2021-11-20 06:08:36,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:36,096 INFO L276 IsEmpty]: Start isEmpty. Operand 18191 states and 21193 transitions. [2021-11-20 06:08:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-20 06:08:36,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:36,138 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, 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] [2021-11-20 06:08:36,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:08:36,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:36,366 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:36,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:36,366 INFO L85 PathProgramCache]: Analyzing trace with hash 414829696, now seen corresponding path program 1 times [2021-11-20 06:08:36,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:36,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721317703] [2021-11-20 06:08:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:36,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:36,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:36,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721317703] [2021-11-20 06:08:36,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721317703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:36,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:36,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:08:36,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138076355] [2021-11-20 06:08:36,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:36,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:36,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:36,483 INFO L87 Difference]: Start difference. First operand 18191 states and 21193 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:37,604 INFO L93 Difference]: Finished difference Result 42876 states and 50739 transitions. [2021-11-20 06:08:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-20 06:08:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:37,662 INFO L225 Difference]: With dead ends: 42876 [2021-11-20 06:08:37,662 INFO L226 Difference]: Without dead ends: 24687 [2021-11-20 06:08:37,684 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 [2021-11-20 06:08:37,685 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 158 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:37,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 126 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:08:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24687 states. [2021-11-20 06:08:38,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24687 to 24687. [2021-11-20 06:08:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 1.1374868346431175) internal successors, (28080), 24686 states have internal predecessors, (28080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 28080 transitions. [2021-11-20 06:08:38,325 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 28080 transitions. Word has length 236 [2021-11-20 06:08:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:38,326 INFO L470 AbstractCegarLoop]: Abstraction has 24687 states and 28080 transitions. [2021-11-20 06:08:38,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 2 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 28080 transitions. [2021-11-20 06:08:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-20 06:08:38,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:38,571 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, 2, 2, 2, 2, 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] [2021-11-20 06:08:38,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:08:38,571 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1383255126, now seen corresponding path program 1 times [2021-11-20 06:08:38,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:38,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309018078] [2021-11-20 06:08:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:38,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:38,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:38,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309018078] [2021-11-20 06:08:38,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309018078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:38,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:38,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:08:38,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549442656] [2021-11-20 06:08:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:38,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:38,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:38,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:38,701 INFO L87 Difference]: Start difference. First operand 24687 states and 28080 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:39,965 INFO L93 Difference]: Finished difference Result 61609 states and 70213 transitions. [2021-11-20 06:08:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2021-11-20 06:08:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:40,061 INFO L225 Difference]: With dead ends: 61609 [2021-11-20 06:08:40,062 INFO L226 Difference]: Without dead ends: 37330 [2021-11-20 06:08:40,095 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 [2021-11-20 06:08:40,096 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:40,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 105 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:08:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37330 states. [2021-11-20 06:08:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37330 to 34657. [2021-11-20 06:08:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34657 states, 34656 states have (on average 1.143409510618652) internal successors, (39626), 34656 states have internal predecessors, (39626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34657 states to 34657 states and 39626 transitions. [2021-11-20 06:08:41,045 INFO L78 Accepts]: Start accepts. Automaton has 34657 states and 39626 transitions. Word has length 252 [2021-11-20 06:08:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:41,045 INFO L470 AbstractCegarLoop]: Abstraction has 34657 states and 39626 transitions. [2021-11-20 06:08:41,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 34657 states and 39626 transitions. [2021-11-20 06:08:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-20 06:08:41,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:41,092 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:08:41,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:08:41,093 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1143032390, now seen corresponding path program 1 times [2021-11-20 06:08:41,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:41,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958534944] [2021-11-20 06:08:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:41,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:41,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:41,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958534944] [2021-11-20 06:08:41,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958534944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:41,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:41,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:08:41,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012545091] [2021-11-20 06:08:41,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:41,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:41,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:41,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:41,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:41,494 INFO L87 Difference]: Start difference. First operand 34657 states and 39626 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:42,709 INFO L93 Difference]: Finished difference Result 81922 states and 93790 transitions. [2021-11-20 06:08:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 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 273 [2021-11-20 06:08:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:42,896 INFO L225 Difference]: With dead ends: 81922 [2021-11-20 06:08:42,896 INFO L226 Difference]: Without dead ends: 48079 [2021-11-20 06:08:42,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:42,942 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 58 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:42,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 302 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:08:43,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48079 states. [2021-11-20 06:08:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48079 to 48067. [2021-11-20 06:08:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48067 states, 48066 states have (on average 1.1245995090084466) internal successors, (54055), 48066 states have internal predecessors, (54055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48067 states to 48067 states and 54055 transitions. [2021-11-20 06:08:44,011 INFO L78 Accepts]: Start accepts. Automaton has 48067 states and 54055 transitions. Word has length 273 [2021-11-20 06:08:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:44,014 INFO L470 AbstractCegarLoop]: Abstraction has 48067 states and 54055 transitions. [2021-11-20 06:08:44,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 48067 states and 54055 transitions. [2021-11-20 06:08:44,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-20 06:08:44,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:44,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:08:44,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:08:44,079 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2060000917, now seen corresponding path program 1 times [2021-11-20 06:08:44,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:44,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938692593] [2021-11-20 06:08:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:44,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:08:44,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938692593] [2021-11-20 06:08:44,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938692593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684627462] [2021-11-20 06:08:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:44,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:44,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:44,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:44,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:08:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:08:44,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 06:08:45,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:08:45,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684627462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:45,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:45,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:08:45,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168042908] [2021-11-20 06:08:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:45,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:45,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:45,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:45,492 INFO L87 Difference]: Start difference. First operand 48067 states and 54055 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:46,604 INFO L93 Difference]: Finished difference Result 95125 states and 107055 transitions. [2021-11-20 06:08:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-11-20 06:08:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:46,674 INFO L225 Difference]: With dead ends: 95125 [2021-11-20 06:08:46,674 INFO L226 Difference]: Without dead ends: 47872 [2021-11-20 06:08:46,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:46,839 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 86 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:46,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:08:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47872 states. [2021-11-20 06:08:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47872 to 47458. [2021-11-20 06:08:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47458 states, 47457 states have (on average 1.1174958383378637) internal successors, (53033), 47457 states have internal predecessors, (53033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47458 states to 47458 states and 53033 transitions. [2021-11-20 06:08:47,754 INFO L78 Accepts]: Start accepts. Automaton has 47458 states and 53033 transitions. Word has length 288 [2021-11-20 06:08:47,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:47,755 INFO L470 AbstractCegarLoop]: Abstraction has 47458 states and 53033 transitions. [2021-11-20 06:08:47,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:47,756 INFO L276 IsEmpty]: Start isEmpty. Operand 47458 states and 53033 transitions. [2021-11-20 06:08:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-11-20 06:08:48,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:48,048 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:48,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:48,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:08:48,249 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1333397972, now seen corresponding path program 1 times [2021-11-20 06:08:48,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:48,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328189016] [2021-11-20 06:08:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:48,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 06:08:48,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:48,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328189016] [2021-11-20 06:08:48,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328189016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:48,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:48,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:08:48,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722803550] [2021-11-20 06:08:48,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:48,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:48,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:48,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:48,439 INFO L87 Difference]: Start difference. First operand 47458 states and 53033 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:49,400 INFO L93 Difference]: Finished difference Result 87966 states and 98185 transitions. [2021-11-20 06:08:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 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 326 [2021-11-20 06:08:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:49,453 INFO L225 Difference]: With dead ends: 87966 [2021-11-20 06:08:49,454 INFO L226 Difference]: Without dead ends: 41322 [2021-11-20 06:08:49,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:49,718 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 224 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:49,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 303 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:08:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41322 states. [2021-11-20 06:08:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41322 to 39696. [2021-11-20 06:08:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39696 states, 39695 states have (on average 1.092631313767477) internal successors, (43372), 39695 states have internal predecessors, (43372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39696 states to 39696 states and 43372 transitions. [2021-11-20 06:08:50,563 INFO L78 Accepts]: Start accepts. Automaton has 39696 states and 43372 transitions. Word has length 326 [2021-11-20 06:08:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:50,563 INFO L470 AbstractCegarLoop]: Abstraction has 39696 states and 43372 transitions. [2021-11-20 06:08:50,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 39696 states and 43372 transitions. [2021-11-20 06:08:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-11-20 06:08:50,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:50,609 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:50,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:08:50,610 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:50,611 INFO L85 PathProgramCache]: Analyzing trace with hash 302232853, now seen corresponding path program 1 times [2021-11-20 06:08:50,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:50,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817813129] [2021-11-20 06:08:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:50,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 154 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:51,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:51,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817813129] [2021-11-20 06:08:51,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817813129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:51,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783069529] [2021-11-20 06:08:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:51,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:51,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:51,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:51,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:08:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:08:51,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:52,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:08:52,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783069529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:52,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:52,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-20 06:08:52,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369902440] [2021-11-20 06:08:52,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:52,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:08:52,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:52,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:08:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:08:52,710 INFO L87 Difference]: Start difference. First operand 39696 states and 43372 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:54,215 INFO L93 Difference]: Finished difference Result 91403 states and 100131 transitions. [2021-11-20 06:08:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:08:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 332 [2021-11-20 06:08:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:54,284 INFO L225 Difference]: With dead ends: 91403 [2021-11-20 06:08:54,284 INFO L226 Difference]: Without dead ends: 52724 [2021-11-20 06:08:54,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:08:54,314 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 410 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:54,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 108 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:08:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52724 states. [2021-11-20 06:08:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52724 to 52079. [2021-11-20 06:08:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52079 states, 52078 states have (on average 1.0798993816966858) internal successors, (56239), 52078 states have internal predecessors, (56239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52079 states to 52079 states and 56239 transitions. [2021-11-20 06:08:55,258 INFO L78 Accepts]: Start accepts. Automaton has 52079 states and 56239 transitions. Word has length 332 [2021-11-20 06:08:55,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:55,258 INFO L470 AbstractCegarLoop]: Abstraction has 52079 states and 56239 transitions. [2021-11-20 06:08:55,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 52079 states and 56239 transitions. [2021-11-20 06:08:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-20 06:08:55,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:55,309 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-20 06:08:55,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 06:08:55,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:08:55,534 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -32862139, now seen corresponding path program 1 times [2021-11-20 06:08:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:55,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252531943] [2021-11-20 06:08:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:55,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-20 06:08:55,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:55,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252531943] [2021-11-20 06:08:55,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252531943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:55,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902707742] [2021-11-20 06:08:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:55,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:55,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:55,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:08:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:08:56,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:08:56,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:08:56,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902707742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:56,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:56,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:08:56,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259283328] [2021-11-20 06:08:56,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:56,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:56,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:56,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:56,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:56,873 INFO L87 Difference]: Start difference. First operand 52079 states and 56239 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:57,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:57,836 INFO L93 Difference]: Finished difference Result 99484 states and 107571 transitions. [2021-11-20 06:08:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:57,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 345 [2021-11-20 06:08:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:57,897 INFO L225 Difference]: With dead ends: 99484 [2021-11-20 06:08:57,897 INFO L226 Difference]: Without dead ends: 48422 [2021-11-20 06:08:57,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:08:57,922 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 109 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:57,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 293 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:08:57,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48422 states. [2021-11-20 06:08:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48422 to 45166. [2021-11-20 06:08:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45166 states, 45165 states have (on average 1.066423115244105) internal successors, (48165), 45165 states have internal predecessors, (48165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45166 states to 45166 states and 48165 transitions. [2021-11-20 06:08:58,802 INFO L78 Accepts]: Start accepts. Automaton has 45166 states and 48165 transitions. Word has length 345 [2021-11-20 06:08:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:58,803 INFO L470 AbstractCegarLoop]: Abstraction has 45166 states and 48165 transitions. [2021-11-20 06:08:58,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 45166 states and 48165 transitions. [2021-11-20 06:08:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-20 06:08:58,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:58,837 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:58,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:59,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:08:59,050 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:59,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash -985881480, now seen corresponding path program 1 times [2021-11-20 06:08:59,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:59,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286224821] [2021-11-20 06:08:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:59,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-20 06:08:59,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:59,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286224821] [2021-11-20 06:08:59,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286224821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:59,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:59,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:08:59,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646528433] [2021-11-20 06:08:59,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:59,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:59,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:59,211 INFO L87 Difference]: Start difference. First operand 45166 states and 48165 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:00,394 INFO L93 Difference]: Finished difference Result 89520 states and 95488 transitions. [2021-11-20 06:09:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:00,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 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 359 [2021-11-20 06:09:00,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:00,444 INFO L225 Difference]: With dead ends: 89520 [2021-11-20 06:09:00,444 INFO L226 Difference]: Without dead ends: 45371 [2021-11-20 06:09:00,463 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 [2021-11-20 06:09:00,464 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:00,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 127 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:09:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45371 states. [2021-11-20 06:09:01,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45371 to 45369. [2021-11-20 06:09:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45369 states, 45368 states have (on average 1.0662801974960325) internal successors, (48375), 45368 states have internal predecessors, (48375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45369 states to 45369 states and 48375 transitions. [2021-11-20 06:09:01,514 INFO L78 Accepts]: Start accepts. Automaton has 45369 states and 48375 transitions. Word has length 359 [2021-11-20 06:09:01,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:01,515 INFO L470 AbstractCegarLoop]: Abstraction has 45369 states and 48375 transitions. [2021-11-20 06:09:01,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:01,515 INFO L276 IsEmpty]: Start isEmpty. Operand 45369 states and 48375 transitions. [2021-11-20 06:09:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-20 06:09:01,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:01,548 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:01,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:09:01,548 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:01,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1903494745, now seen corresponding path program 1 times [2021-11-20 06:09:01,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:01,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394959594] [2021-11-20 06:09:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:01,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 06:09:01,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:01,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394959594] [2021-11-20 06:09:01,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394959594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:09:01,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938232494] [2021-11-20 06:09:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:01,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:01,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:01,690 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:09:01,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:09:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:09:01,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 06:09:02,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:09:02,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938232494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:02,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:09:02,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-20 06:09:02,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138875689] [2021-11-20 06:09:02,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:02,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:02,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:02,772 INFO L87 Difference]: Start difference. First operand 45369 states and 48375 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:04,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:04,341 INFO L93 Difference]: Finished difference Result 125121 states and 133467 transitions. [2021-11-20 06:09:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:04,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 364 [2021-11-20 06:09:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:04,456 INFO L225 Difference]: With dead ends: 125121 [2021-11-20 06:09:04,456 INFO L226 Difference]: Without dead ends: 80972 [2021-11-20 06:09:04,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:09:04,466 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 498 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:04,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 432 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:09:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80972 states. [2021-11-20 06:09:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80972 to 79732. [2021-11-20 06:09:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79732 states, 79731 states have (on average 1.065984372452371) internal successors, (84992), 79731 states have internal predecessors, (84992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79732 states to 79732 states and 84992 transitions. [2021-11-20 06:09:05,764 INFO L78 Accepts]: Start accepts. Automaton has 79732 states and 84992 transitions. Word has length 364 [2021-11-20 06:09:05,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:05,764 INFO L470 AbstractCegarLoop]: Abstraction has 79732 states and 84992 transitions. [2021-11-20 06:09:05,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 79732 states and 84992 transitions. [2021-11-20 06:09:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-20 06:09:05,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:05,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:05,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:05,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:09:06,000 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -698379154, now seen corresponding path program 1 times [2021-11-20 06:09:06,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695803662] [2021-11-20 06:09:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:06,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 192 proven. 6 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-20 06:09:06,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:06,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695803662] [2021-11-20 06:09:06,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695803662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:09:06,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578235700] [2021-11-20 06:09:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:06,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:06,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:09:06,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:09:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:06,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:09:06,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-20 06:09:07,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:09:07,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578235700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:07,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:09:07,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-20 06:09:07,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39857403] [2021-11-20 06:09:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:07,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:07,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:07,198 INFO L87 Difference]: Start difference. First operand 79732 states and 84992 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:08,471 INFO L93 Difference]: Finished difference Result 233906 states and 249387 transitions. [2021-11-20 06:09:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:08,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 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 366 [2021-11-20 06:09:08,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:08,667 INFO L225 Difference]: With dead ends: 233906 [2021-11-20 06:09:08,667 INFO L226 Difference]: Without dead ends: 155394 [2021-11-20 06:09:08,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:09:08,721 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 185 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:08,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 485 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:09:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155394 states. [2021-11-20 06:09:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155394 to 155390. [2021-11-20 06:09:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155390 states, 155389 states have (on average 1.0656738894001505) internal successors, (165594), 155389 states have internal predecessors, (165594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155390 states to 155390 states and 165594 transitions. [2021-11-20 06:09:12,379 INFO L78 Accepts]: Start accepts. Automaton has 155390 states and 165594 transitions. Word has length 366 [2021-11-20 06:09:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:12,379 INFO L470 AbstractCegarLoop]: Abstraction has 155390 states and 165594 transitions. [2021-11-20 06:09:12,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 155390 states and 165594 transitions. [2021-11-20 06:09:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-20 06:09:12,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:12,414 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:12,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:09:12,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:12,625 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:12,625 INFO L85 PathProgramCache]: Analyzing trace with hash 598075760, now seen corresponding path program 1 times [2021-11-20 06:09:12,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:12,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092685064] [2021-11-20 06:09:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:12,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:09:12,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:12,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092685064] [2021-11-20 06:09:12,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092685064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:12,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:12,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:09:12,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517883071] [2021-11-20 06:09:12,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:12,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:12,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:12,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:12,836 INFO L87 Difference]: Start difference. First operand 155390 states and 165594 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:15,208 INFO L93 Difference]: Finished difference Result 327655 states and 348716 transitions. [2021-11-20 06:09:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:15,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 366 [2021-11-20 06:09:15,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:15,447 INFO L225 Difference]: With dead ends: 327655 [2021-11-20 06:09:15,447 INFO L226 Difference]: Without dead ends: 173485 [2021-11-20 06:09:15,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:09:15,509 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 166 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:15,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 323 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:09:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173485 states. [2021-11-20 06:09:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173485 to 173457. [2021-11-20 06:09:18,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173457 states, 173456 states have (on average 1.0604072502536666) internal successors, (183934), 173456 states have internal predecessors, (183934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173457 states to 173457 states and 183934 transitions. [2021-11-20 06:09:19,646 INFO L78 Accepts]: Start accepts. Automaton has 173457 states and 183934 transitions. Word has length 366 [2021-11-20 06:09:19,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:19,649 INFO L470 AbstractCegarLoop]: Abstraction has 173457 states and 183934 transitions. [2021-11-20 06:09:19,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 173457 states and 183934 transitions. [2021-11-20 06:09:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-20 06:09:19,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:19,744 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:19,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:09:19,745 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:19,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1124981834, now seen corresponding path program 1 times [2021-11-20 06:09:19,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:19,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655593921] [2021-11-20 06:09:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:19,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:19,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 221 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:09:20,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655593921] [2021-11-20 06:09:20,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655593921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:09:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036311928] [2021-11-20 06:09:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:20,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:09:20,294 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:09:20,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:09:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:20,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:09:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:09:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-20 06:09:21,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:09:21,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036311928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:21,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:09:21,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-20 06:09:21,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367542117] [2021-11-20 06:09:21,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:21,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:09:21,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:21,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:09:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:21,420 INFO L87 Difference]: Start difference. First operand 173457 states and 183934 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:23,870 INFO L93 Difference]: Finished difference Result 349416 states and 371083 transitions. [2021-11-20 06:09:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:09:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 383 [2021-11-20 06:09:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:24,118 INFO L225 Difference]: With dead ends: 349416 [2021-11-20 06:09:24,119 INFO L226 Difference]: Without dead ends: 177179 [2021-11-20 06:09:24,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:09:24,190 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 53 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:24,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 315 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:09:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177179 states. [2021-11-20 06:09:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177179 to 173853. [2021-11-20 06:09:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173853 states, 173852 states have (on average 1.0601603662885672) internal successors, (184311), 173852 states have internal predecessors, (184311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173853 states to 173853 states and 184311 transitions. [2021-11-20 06:09:27,762 INFO L78 Accepts]: Start accepts. Automaton has 173853 states and 184311 transitions. Word has length 383 [2021-11-20 06:09:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:09:27,763 INFO L470 AbstractCegarLoop]: Abstraction has 173853 states and 184311 transitions. [2021-11-20 06:09:27,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 173853 states and 184311 transitions. [2021-11-20 06:09:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-11-20 06:09:27,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:09:27,807 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:09:27,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 06:09:28,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14733e8c-9409-4603-a531-be1b2108e024/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:09:28,009 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:09:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:09:28,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2057443229, now seen corresponding path program 1 times [2021-11-20 06:09:28,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:09:28,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424254210] [2021-11-20 06:09:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:09:28,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:09:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:09:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-11-20 06:09:28,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:09:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424254210] [2021-11-20 06:09:28,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424254210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:09:28,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:09:28,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:09:28,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15113689] [2021-11-20 06:09:28,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:09:28,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:09:28,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:09:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:09:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:28,833 INFO L87 Difference]: Start difference. First operand 173853 states and 184311 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:09:32,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:09:32,175 INFO L93 Difference]: Finished difference Result 478767 states and 507483 transitions. [2021-11-20 06:09:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:09:32,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 395 [2021-11-20 06:09:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:09:32,657 INFO L225 Difference]: With dead ends: 478767 [2021-11-20 06:09:32,657 INFO L226 Difference]: Without dead ends: 306337 [2021-11-20 06:09:32,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:09:32,751 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 713 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:09:32,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [713 Valid, 300 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:09:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306337 states.