./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label33.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label33.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y --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 f1d6c7224567b6057eecb8e0076a48aebc20a409238cb7be9c0543149a96c59f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:08:28,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:08:28,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:08:28,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:08:28,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:08:28,590 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:08:28,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:08:28,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:08:28,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:08:28,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:08:28,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:08:28,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:08:28,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:08:28,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:08:28,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:08:28,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:08:28,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:08:28,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:08:28,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:08:28,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:08:28,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:08:28,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:08:28,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:08:28,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:08:28,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:08:28,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:08:28,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:08:28,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:08:28,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:08:28,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:08:28,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:08:28,655 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:08:28,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:08:28,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:08:28,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:08:28,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:08:28,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:08:28,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:08:28,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:08:28,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:08:28,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:08:28,663 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:08:28,688 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:08:28,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:08:28,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:08:28,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:08:28,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:08:28,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:08:28,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:08:28,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:08:28,690 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:08:28,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:08:28,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:08:28,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:08:28,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:08:28,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:08:28,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:08:28,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:08:28,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:08:28,692 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:08:28,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:08:28,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:08:28,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:08:28,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:08:28,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:08:28,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:08:28,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:08:28,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:08:28,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:08:28,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:08:28,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:08:28,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:08:28,694 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:08:28,695 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:08:28,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:08:28,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:08:28,695 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_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1d6c7224567b6057eecb8e0076a48aebc20a409238cb7be9c0543149a96c59f [2021-11-13 18:08:28,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:08:28,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:08:29,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:08:29,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:08:29,003 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:08:29,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem17_label33.c [2021-11-13 18:08:29,090 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/data/bf394ca64/74d89020450341e98daa7b281da9a9fb/FLAG2950a0688 [2021-11-13 18:08:29,846 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:08:29,847 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/sv-benchmarks/c/eca-rers2012/Problem17_label33.c [2021-11-13 18:08:29,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/data/bf394ca64/74d89020450341e98daa7b281da9a9fb/FLAG2950a0688 [2021-11-13 18:08:29,939 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/data/bf394ca64/74d89020450341e98daa7b281da9a9fb [2021-11-13 18:08:29,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:08:29,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:08:29,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:08:29,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:08:29,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:08:29,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:08:29" (1/1) ... [2021-11-13 18:08:29,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f44e98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:29, skipping insertion in model container [2021-11-13 18:08:29,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:08:29" (1/1) ... [2021-11-13 18:08:29,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:08:30,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:08:30,348 WARN L228 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_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/sv-benchmarks/c/eca-rers2012/Problem17_label33.c[2518,2531] [2021-11-13 18:08:31,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:08:31,121 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:08:31,153 WARN L228 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_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/sv-benchmarks/c/eca-rers2012/Problem17_label33.c[2518,2531] [2021-11-13 18:08:31,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:08:31,572 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:08:31,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31 WrapperNode [2021-11-13 18:08:31,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:08:31,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:08:31,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:08:31,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:08:31,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:31,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:08:32,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:08:32,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:08:32,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:08:32,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:08:32,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:08:32,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:08:32,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:08:32,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (1/1) ... [2021-11-13 18:08:32,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:08:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:08:32,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:08:32,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:08:32,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:08:32,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:08:32,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:08:32,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:08:36,588 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:08:36,589 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:08:36,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:08:36 BoogieIcfgContainer [2021-11-13 18:08:36,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:08:36,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:08:36,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:08:36,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:08:36,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:08:29" (1/3) ... [2021-11-13 18:08:36,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64380fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:08:36, skipping insertion in model container [2021-11-13 18:08:36,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:08:31" (2/3) ... [2021-11-13 18:08:36,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64380fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:08:36, skipping insertion in model container [2021-11-13 18:08:36,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:08:36" (3/3) ... [2021-11-13 18:08:36,603 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label33.c [2021-11-13 18:08:36,612 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:08:36,612 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:08:36,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:08:36,683 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 [2021-11-13 18:08:36,684 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:08:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:08:36,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:36,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:36,727 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1657508526, now seen corresponding path program 1 times [2021-11-13 18:08:36,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:36,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583225724] [2021-11-13 18:08:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:36,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:36,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:36,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583225724] [2021-11-13 18:08:36,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583225724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:36,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:36,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:08:36,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788145360] [2021-11-13 18:08:36,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:36,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:08:36,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:36,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:08:36,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:08:36,974 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:40,590 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2021-11-13 18:08:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:08:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-13 18:08:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:40,631 INFO L225 Difference]: With dead ends: 1667 [2021-11-13 18:08:40,631 INFO L226 Difference]: Without dead ends: 998 [2021-11-13 18:08:40,641 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 [2021-11-13 18:08:40,646 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 529 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2926.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.18ms SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3481.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:40,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 20.18ms Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 3481.07ms Time] [2021-11-13 18:08:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-11-13 18:08:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2021-11-13 18:08:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2021-11-13 18:08:40,763 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 16 [2021-11-13 18:08:40,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:40,764 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2021-11-13 18:08:40,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2021-11-13 18:08:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 18:08:40,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:40,769 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:08:40,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:08:40,769 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash 38833391, now seen corresponding path program 1 times [2021-11-13 18:08:40,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:40,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524069910] [2021-11-13 18:08:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:40,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:40,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:40,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524069910] [2021-11-13 18:08:40,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524069910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:40,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:40,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:08:40,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727718255] [2021-11-13 18:08:40,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:40,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:08:40,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:40,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:08:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:08:40,921 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:43,992 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2021-11-13 18:08:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:08:43,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-13 18:08:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:44,007 INFO L225 Difference]: With dead ends: 2841 [2021-11-13 18:08:44,007 INFO L226 Difference]: Without dead ends: 1861 [2021-11-13 18:08:44,009 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 [2021-11-13 18:08:44,011 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2573.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.41ms SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2981.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:44,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 14.41ms Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 2981.42ms Time] [2021-11-13 18:08:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-11-13 18:08:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2021-11-13 18:08:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2021-11-13 18:08:44,065 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 81 [2021-11-13 18:08:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:44,065 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2021-11-13 18:08:44,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2021-11-13 18:08:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 18:08:44,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:44,071 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:08:44,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:08:44,072 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:44,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1101270044, now seen corresponding path program 1 times [2021-11-13 18:08:44,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:44,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491272937] [2021-11-13 18:08:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:44,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:44,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:44,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491272937] [2021-11-13 18:08:44,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491272937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:44,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:44,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:08:44,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407869415] [2021-11-13 18:08:44,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:44,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:08:44,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:08:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:08:44,329 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:47,541 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2021-11-13 18:08:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:08:47,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-13 18:08:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:47,558 INFO L225 Difference]: With dead ends: 4591 [2021-11-13 18:08:47,559 INFO L226 Difference]: Without dead ends: 2736 [2021-11-13 18:08:47,562 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 [2021-11-13 18:08:47,563 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2737.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.32ms SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3141.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:47,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 13.32ms Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 3141.95ms Time] [2021-11-13 18:08:47,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-11-13 18:08:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2021-11-13 18:08:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2021-11-13 18:08:47,632 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 121 [2021-11-13 18:08:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:47,633 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2021-11-13 18:08:47,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2021-11-13 18:08:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 18:08:47,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:47,637 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:08:47,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:08:47,638 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash 582217397, now seen corresponding path program 1 times [2021-11-13 18:08:47,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:47,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046781944] [2021-11-13 18:08:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:47,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:47,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:47,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046781944] [2021-11-13 18:08:47,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046781944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:47,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:47,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:08:47,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505134272] [2021-11-13 18:08:47,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:47,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:08:47,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:08:47,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:08:47,733 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:50,442 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2021-11-13 18:08:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:08:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-11-13 18:08:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:50,468 INFO L225 Difference]: With dead ends: 6709 [2021-11-13 18:08:50,469 INFO L226 Difference]: Without dead ends: 3995 [2021-11-13 18:08:50,473 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 [2021-11-13 18:08:50,483 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2246.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.16ms SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2623.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:50,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 12.16ms Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2623.36ms Time] [2021-11-13 18:08:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-11-13 18:08:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2021-11-13 18:08:50,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2021-11-13 18:08:50,569 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 127 [2021-11-13 18:08:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:50,571 INFO L470 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2021-11-13 18:08:50,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2021-11-13 18:08:50,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 18:08:50,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:50,576 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:50,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:08:50,576 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1582736769, now seen corresponding path program 1 times [2021-11-13 18:08:50,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:50,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134532956] [2021-11-13 18:08:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:50,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:08:50,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:50,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134532956] [2021-11-13 18:08:50,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134532956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:50,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:50,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:08:50,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251172958] [2021-11-13 18:08:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:50,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:08:50,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:50,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:08:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:08:50,812 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:54,237 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2021-11-13 18:08:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:08:54,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-13 18:08:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:54,264 INFO L225 Difference]: With dead ends: 8019 [2021-11-13 18:08:54,264 INFO L226 Difference]: Without dead ends: 4879 [2021-11-13 18:08:54,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:08:54,272 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1096 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2806.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.91ms SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3295.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:54,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 881 Invalid, 2803 Unknown, 0 Unchecked, 19.91ms Time], IncrementalHoareTripleChecker [813 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 3295.22ms Time] [2021-11-13 18:08:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-11-13 18:08:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2021-11-13 18:08:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2021-11-13 18:08:54,391 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 164 [2021-11-13 18:08:54,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:54,391 INFO L470 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2021-11-13 18:08:54,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2021-11-13 18:08:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-13 18:08:54,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:54,395 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:54,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:08:54,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash -387388432, now seen corresponding path program 1 times [2021-11-13 18:08:54,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:54,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487801761] [2021-11-13 18:08:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:54,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:08:54,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:54,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487801761] [2021-11-13 18:08:54,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487801761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:54,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:54,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:08:54,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313349634] [2021-11-13 18:08:54,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:54,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:08:54,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:08:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:08:54,547 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:57,364 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2021-11-13 18:08:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:08:57,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 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 170 [2021-11-13 18:08:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:57,461 INFO L225 Difference]: With dead ends: 12249 [2021-11-13 18:08:57,462 INFO L226 Difference]: Without dead ends: 7399 [2021-11-13 18:08:57,468 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 [2021-11-13 18:08:57,469 INFO L933 BasicCegarLoop]: 481 mSDtfsCounter, 432 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2349.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.15ms SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2730.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:57,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 8.15ms Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 2730.72ms Time] [2021-11-13 18:08:57,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2021-11-13 18:08:57,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2021-11-13 18:08:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2021-11-13 18:08:57,619 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 170 [2021-11-13 18:08:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:57,620 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2021-11-13 18:08:57,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2021-11-13 18:08:57,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-13 18:08:57,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:57,624 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:08:57,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:08:57,625 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash 591527748, now seen corresponding path program 1 times [2021-11-13 18:08:57,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:57,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172212420] [2021-11-13 18:08:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:57,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:08:57,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:57,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172212420] [2021-11-13 18:08:57,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172212420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:57,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:57,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:08:57,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902134783] [2021-11-13 18:08:57,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:57,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:08:57,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:08:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:08:57,738 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:00,199 INFO L93 Difference]: Finished difference Result 13481 states and 17131 transitions. [2021-11-13 18:09:00,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:00,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 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 183 [2021-11-13 18:09:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:00,242 INFO L225 Difference]: With dead ends: 13481 [2021-11-13 18:09:00,242 INFO L226 Difference]: Without dead ends: 8657 [2021-11-13 18:09:00,249 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 [2021-11-13 18:09:00,250 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 468 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2051.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.40ms SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2382.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:00,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 483 Invalid, 1748 Unknown, 0 Unchecked, 5.40ms Time], IncrementalHoareTripleChecker [328 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 2382.95ms Time] [2021-11-13 18:09:00,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8657 states. [2021-11-13 18:09:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8657 to 7378. [2021-11-13 18:09:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7378 states, 7377 states have (on average 1.2479327639962043) internal successors, (9206), 7377 states have internal predecessors, (9206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:00,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7378 states to 7378 states and 9206 transitions. [2021-11-13 18:09:00,414 INFO L78 Accepts]: Start accepts. Automaton has 7378 states and 9206 transitions. Word has length 183 [2021-11-13 18:09:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:00,414 INFO L470 AbstractCegarLoop]: Abstraction has 7378 states and 9206 transitions. [2021-11-13 18:09:00,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand 7378 states and 9206 transitions. [2021-11-13 18:09:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-13 18:09:00,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:00,419 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:00,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:09:00,420 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:00,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1880356032, now seen corresponding path program 1 times [2021-11-13 18:09:00,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:00,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334972734] [2021-11-13 18:09:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:00,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:00,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:00,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334972734] [2021-11-13 18:09:00,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334972734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:00,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:00,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:09:00,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243120921] [2021-11-13 18:09:00,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:00,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:00,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:00,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:00,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:09:00,639 INFO L87 Difference]: Start difference. First operand 7378 states and 9206 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:03,070 INFO L93 Difference]: Finished difference Result 19035 states and 23868 transitions. [2021-11-13 18:09:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:03,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-11-13 18:09:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:03,093 INFO L225 Difference]: With dead ends: 19035 [2021-11-13 18:09:03,093 INFO L226 Difference]: Without dead ends: 10807 [2021-11-13 18:09:03,103 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 [2021-11-13 18:09:03,104 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 370 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1977.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.39ms SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2324.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:03,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 896 Invalid, 1672 Unknown, 0 Unchecked, 6.39ms Time], IncrementalHoareTripleChecker [350 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 2324.49ms Time] [2021-11-13 18:09:03,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10807 states. [2021-11-13 18:09:03,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10807 to 10799. [2021-11-13 18:09:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10799 states, 10798 states have (on average 1.1793850713095018) internal successors, (12735), 10798 states have internal predecessors, (12735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10799 states to 10799 states and 12735 transitions. [2021-11-13 18:09:03,279 INFO L78 Accepts]: Start accepts. Automaton has 10799 states and 12735 transitions. Word has length 232 [2021-11-13 18:09:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:03,280 INFO L470 AbstractCegarLoop]: Abstraction has 10799 states and 12735 transitions. [2021-11-13 18:09:03,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10799 states and 12735 transitions. [2021-11-13 18:09:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 18:09:03,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:03,285 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:03,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:09:03,286 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash -18097380, now seen corresponding path program 1 times [2021-11-13 18:09:03,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:03,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541313967] [2021-11-13 18:09:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:03,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 166 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:03,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:03,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541313967] [2021-11-13 18:09:03,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541313967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:03,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150497843] [2021-11-13 18:09:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:03,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:03,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:03,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:03,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:09:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:09:03,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 166 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:04,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:05,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150497843] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:05,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:09:05,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-13 18:09:05,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666828361] [2021-11-13 18:09:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:05,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:09:05,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:09:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:09:05,302 INFO L87 Difference]: Start difference. First operand 10799 states and 12735 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:09,371 INFO L93 Difference]: Finished difference Result 35677 states and 42172 transitions. [2021-11-13 18:09:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:09:09,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 240 [2021-11-13 18:09:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:09,414 INFO L225 Difference]: With dead ends: 35677 [2021-11-13 18:09:09,414 INFO L226 Difference]: Without dead ends: 24019 [2021-11-13 18:09:09,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 475 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:09:09,427 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 889 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 752 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3305.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.85ms SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3892.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:09,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 159 Invalid, 3046 Unknown, 0 Unchecked, 9.85ms Time], IncrementalHoareTripleChecker [752 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 3892.66ms Time] [2021-11-13 18:09:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24019 states. [2021-11-13 18:09:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24019 to 22742. [2021-11-13 18:09:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22742 states, 22741 states have (on average 1.1553141902291015) internal successors, (26273), 22741 states have internal predecessors, (26273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22742 states to 22742 states and 26273 transitions. [2021-11-13 18:09:09,771 INFO L78 Accepts]: Start accepts. Automaton has 22742 states and 26273 transitions. Word has length 240 [2021-11-13 18:09:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:09,771 INFO L470 AbstractCegarLoop]: Abstraction has 22742 states and 26273 transitions. [2021-11-13 18:09:09,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 22742 states and 26273 transitions. [2021-11-13 18:09:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-13 18:09:09,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:09,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:09,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:10,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:09:10,003 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:10,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1861634320, now seen corresponding path program 1 times [2021-11-13 18:09:10,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:10,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858309573] [2021-11-13 18:09:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:10,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:09:10,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:10,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858309573] [2021-11-13 18:09:10,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858309573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:10,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:10,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:09:10,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764893911] [2021-11-13 18:09:10,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:10,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:10,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:09:10,138 INFO L87 Difference]: Start difference. First operand 22742 states and 26273 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:12,349 INFO L93 Difference]: Finished difference Result 50583 states and 58592 transitions. [2021-11-13 18:09:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:12,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-11-13 18:09:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:12,405 INFO L225 Difference]: With dead ends: 50583 [2021-11-13 18:09:12,405 INFO L226 Difference]: Without dead ends: 27416 [2021-11-13 18:09:12,429 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 [2021-11-13 18:09:12,430 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 378 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1642.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.88ms SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1975.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:12,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 842 Invalid, 1399 Unknown, 0 Unchecked, 5.88ms Time], IncrementalHoareTripleChecker [206 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1975.22ms Time] [2021-11-13 18:09:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27416 states. [2021-11-13 18:09:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27416 to 27416. [2021-11-13 18:09:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27416 states, 27415 states have (on average 1.1312055444099944) internal successors, (31012), 27415 states have internal predecessors, (31012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27416 states to 27416 states and 31012 transitions. [2021-11-13 18:09:12,813 INFO L78 Accepts]: Start accepts. Automaton has 27416 states and 31012 transitions. Word has length 253 [2021-11-13 18:09:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:12,814 INFO L470 AbstractCegarLoop]: Abstraction has 27416 states and 31012 transitions. [2021-11-13 18:09:12,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27416 states and 31012 transitions. [2021-11-13 18:09:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-13 18:09:12,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:12,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:09:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:09:12,823 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1700470054, now seen corresponding path program 1 times [2021-11-13 18:09:12,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:12,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418058082] [2021-11-13 18:09:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:12,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 78 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:13,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:13,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418058082] [2021-11-13 18:09:13,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418058082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:13,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663679995] [2021-11-13 18:09:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:13,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:13,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:13,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:09:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:09:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 78 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:14,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:15,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663679995] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:15,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:09:15,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-11-13 18:09:15,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524503349] [2021-11-13 18:09:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:09:15,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:09:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:09:15,004 INFO L87 Difference]: Start difference. First operand 27416 states and 31012 transitions. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:18,755 INFO L93 Difference]: Finished difference Result 68481 states and 77437 transitions. [2021-11-13 18:09:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:09:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2021-11-13 18:09:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:18,799 INFO L225 Difference]: With dead ends: 68481 [2021-11-13 18:09:18,800 INFO L226 Difference]: Without dead ends: 40640 [2021-11-13 18:09:18,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 617 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:09:18,815 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 838 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2978.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.98ms SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3453.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:18,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 195 Invalid, 2835 Unknown, 0 Unchecked, 7.98ms Time], IncrementalHoareTripleChecker [499 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 3453.29ms Time] [2021-11-13 18:09:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40640 states. [2021-11-13 18:09:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40640 to 38512. [2021-11-13 18:09:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38512 states, 38511 states have (on average 1.1338578587935915) internal successors, (43666), 38511 states have internal predecessors, (43666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38512 states to 38512 states and 43666 transitions. [2021-11-13 18:09:19,515 INFO L78 Accepts]: Start accepts. Automaton has 38512 states and 43666 transitions. Word has length 311 [2021-11-13 18:09:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:19,515 INFO L470 AbstractCegarLoop]: Abstraction has 38512 states and 43666 transitions. [2021-11-13 18:09:19,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:19,516 INFO L276 IsEmpty]: Start isEmpty. Operand 38512 states and 43666 transitions. [2021-11-13 18:09:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-13 18:09:19,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:19,563 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:19,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:19,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:19,764 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:19,764 INFO L85 PathProgramCache]: Analyzing trace with hash 873519532, now seen corresponding path program 1 times [2021-11-13 18:09:19,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:19,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569533401] [2021-11-13 18:09:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:19,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-13 18:09:20,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:20,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569533401] [2021-11-13 18:09:20,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569533401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:20,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:20,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:09:20,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810342695] [2021-11-13 18:09:20,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:20,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:20,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:20,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:09:20,084 INFO L87 Difference]: Start difference. First operand 38512 states and 43666 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:22,084 INFO L93 Difference]: Finished difference Result 89785 states and 102267 transitions. [2021-11-13 18:09:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 411 [2021-11-13 18:09:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:22,140 INFO L225 Difference]: With dead ends: 89785 [2021-11-13 18:09:22,140 INFO L226 Difference]: Without dead ends: 49573 [2021-11-13 18:09:22,160 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 [2021-11-13 18:09:22,161 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 338 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1466.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.56ms SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1731.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:22,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 787 Invalid, 1427 Unknown, 0 Unchecked, 4.56ms Time], IncrementalHoareTripleChecker [258 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1731.23ms Time] [2021-11-13 18:09:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49573 states. [2021-11-13 18:09:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49573 to 37619. [2021-11-13 18:09:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37619 states, 37618 states have (on average 1.132729012706683) internal successors, (42611), 37618 states have internal predecessors, (42611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37619 states to 37619 states and 42611 transitions. [2021-11-13 18:09:22,915 INFO L78 Accepts]: Start accepts. Automaton has 37619 states and 42611 transitions. Word has length 411 [2021-11-13 18:09:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:22,916 INFO L470 AbstractCegarLoop]: Abstraction has 37619 states and 42611 transitions. [2021-11-13 18:09:22,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 37619 states and 42611 transitions. [2021-11-13 18:09:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-11-13 18:09:22,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:22,926 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:22,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:09:22,926 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:22,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:22,929 INFO L85 PathProgramCache]: Analyzing trace with hash -826212447, now seen corresponding path program 1 times [2021-11-13 18:09:22,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:22,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070183687] [2021-11-13 18:09:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:22,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-11-13 18:09:23,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:23,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070183687] [2021-11-13 18:09:23,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070183687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:23,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:23,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:09:23,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198404540] [2021-11-13 18:09:23,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:23,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:23,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:23,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:09:23,182 INFO L87 Difference]: Start difference. First operand 37619 states and 42611 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:26,263 INFO L93 Difference]: Finished difference Result 87614 states and 98821 transitions. [2021-11-13 18:09:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:26,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 412 [2021-11-13 18:09:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:26,335 INFO L225 Difference]: With dead ends: 87614 [2021-11-13 18:09:26,335 INFO L226 Difference]: Without dead ends: 49571 [2021-11-13 18:09:26,347 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 [2021-11-13 18:09:26,348 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 476 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2268.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.31ms SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2589.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:26,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 348 Invalid, 1539 Unknown, 0 Unchecked, 5.31ms Time], IncrementalHoareTripleChecker [175 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 2589.80ms Time] [2021-11-13 18:09:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49571 states. [2021-11-13 18:09:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49571 to 38042. [2021-11-13 18:09:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38042 states, 38041 states have (on average 1.1311216844983045) internal successors, (43029), 38041 states have internal predecessors, (43029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38042 states to 38042 states and 43029 transitions. [2021-11-13 18:09:26,902 INFO L78 Accepts]: Start accepts. Automaton has 38042 states and 43029 transitions. Word has length 412 [2021-11-13 18:09:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:26,903 INFO L470 AbstractCegarLoop]: Abstraction has 38042 states and 43029 transitions. [2021-11-13 18:09:26,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 38042 states and 43029 transitions. [2021-11-13 18:09:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-13 18:09:26,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:26,915 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:26,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:09:26,915 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1921236114, now seen corresponding path program 1 times [2021-11-13 18:09:26,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:26,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974349068] [2021-11-13 18:09:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:26,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-11-13 18:09:27,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:27,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974349068] [2021-11-13 18:09:27,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974349068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:27,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:27,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:09:27,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608318624] [2021-11-13 18:09:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:27,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:09:27,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:09:27,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:09:27,106 INFO L87 Difference]: Start difference. First operand 38042 states and 43029 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:30,645 INFO L93 Difference]: Finished difference Result 90134 states and 101693 transitions. [2021-11-13 18:09:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:09:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 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 439 [2021-11-13 18:09:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:30,714 INFO L225 Difference]: With dead ends: 90134 [2021-11-13 18:09:30,715 INFO L226 Difference]: Without dead ends: 51668 [2021-11-13 18:09:30,731 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 [2021-11-13 18:09:30,732 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 489 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2813.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.89ms SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3150.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:30,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 299 Invalid, 1524 Unknown, 0 Unchecked, 5.89ms Time], IncrementalHoareTripleChecker [211 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 3150.08ms Time] [2021-11-13 18:09:30,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51668 states. [2021-11-13 18:09:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51668 to 38441. [2021-11-13 18:09:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38441 states, 38440 states have (on average 1.1205515088449531) internal successors, (43074), 38440 states have internal predecessors, (43074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38441 states to 38441 states and 43074 transitions. [2021-11-13 18:09:31,375 INFO L78 Accepts]: Start accepts. Automaton has 38441 states and 43074 transitions. Word has length 439 [2021-11-13 18:09:31,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:31,375 INFO L470 AbstractCegarLoop]: Abstraction has 38441 states and 43074 transitions. [2021-11-13 18:09:31,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 38441 states and 43074 transitions. [2021-11-13 18:09:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-13 18:09:31,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:31,388 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:09:31,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:09:31,389 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1085398361, now seen corresponding path program 1 times [2021-11-13 18:09:31,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:31,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105873089] [2021-11-13 18:09:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:31,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 296 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:09:31,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:31,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105873089] [2021-11-13 18:09:31,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105873089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:31,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213286204] [2021-11-13 18:09:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:31,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:31,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:31,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:31,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:09:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:09:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:09:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 214 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:33,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:09:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 214 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:09:35,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213286204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:09:35,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:09:35,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-11-13 18:09:35,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262969927] [2021-11-13 18:09:35,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:09:35,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:09:35,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:35,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:09:35,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:09:35,107 INFO L87 Difference]: Start difference. First operand 38441 states and 43074 transitions. Second operand has 9 states, 9 states have (on average 119.66666666666667) internal successors, (1077), 9 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:48,891 INFO L93 Difference]: Finished difference Result 126305 states and 141670 transitions. [2021-11-13 18:09:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:09:48,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 119.66666666666667) internal successors, (1077), 9 states have internal predecessors, (1077), 0 states have call successors, (0), 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 451 [2021-11-13 18:09:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:48,963 INFO L225 Difference]: With dead ends: 126305 [2021-11-13 18:09:48,963 INFO L226 Difference]: Without dead ends: 86589 [2021-11-13 18:09:48,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 909 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:09:48,978 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 7416 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 11778 mSolverCounterSat, 2708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11053.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7416 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 14486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.37ms SdHoareTripleChecker+Time, 2708 IncrementalHoareTripleChecker+Valid, 11778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12976.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:48,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7416 Valid, 454 Invalid, 14486 Unknown, 0 Unchecked, 40.37ms Time], IncrementalHoareTripleChecker [2708 Valid, 11778 Invalid, 0 Unknown, 0 Unchecked, 12976.23ms Time] [2021-11-13 18:09:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86589 states. [2021-11-13 18:09:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86589 to 76327. [2021-11-13 18:09:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76327 states, 76326 states have (on average 1.1106045122238817) internal successors, (84768), 76326 states have internal predecessors, (84768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76327 states to 76327 states and 84768 transitions. [2021-11-13 18:09:50,102 INFO L78 Accepts]: Start accepts. Automaton has 76327 states and 84768 transitions. Word has length 451 [2021-11-13 18:09:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:50,102 INFO L470 AbstractCegarLoop]: Abstraction has 76327 states and 84768 transitions. [2021-11-13 18:09:50,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 119.66666666666667) internal successors, (1077), 9 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76327 states and 84768 transitions. [2021-11-13 18:09:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-13 18:09:50,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:50,113 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:50,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:09:50,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:09:50,335 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash 503973094, now seen corresponding path program 1 times [2021-11-13 18:09:50,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:50,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860228248] [2021-11-13 18:09:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:50,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-13 18:09:50,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:50,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860228248] [2021-11-13 18:09:50,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860228248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:50,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:50,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:09:50,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701257683] [2021-11-13 18:09:50,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:50,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:09:50,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:09:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:09:50,554 INFO L87 Difference]: Start difference. First operand 76327 states and 84768 transitions. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:54,882 INFO L93 Difference]: Finished difference Result 181221 states and 200640 transitions. [2021-11-13 18:09:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:09:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 460 [2021-11-13 18:09:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:54,986 INFO L225 Difference]: With dead ends: 181221 [2021-11-13 18:09:54,986 INFO L226 Difference]: Without dead ends: 101487 [2021-11-13 18:09:55,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:09:55,010 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 773 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2670 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3134.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 3051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.64ms SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3646.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:55,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 276 Invalid, 3051 Unknown, 0 Unchecked, 11.64ms Time], IncrementalHoareTripleChecker [381 Valid, 2670 Invalid, 0 Unknown, 0 Unchecked, 3646.79ms Time] [2021-11-13 18:09:55,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101487 states. [2021-11-13 18:09:56,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101487 to 96339. [2021-11-13 18:09:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96339 states, 96338 states have (on average 1.1052647968610516) internal successors, (106479), 96338 states have internal predecessors, (106479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96339 states to 96339 states and 106479 transitions. [2021-11-13 18:09:56,532 INFO L78 Accepts]: Start accepts. Automaton has 96339 states and 106479 transitions. Word has length 460 [2021-11-13 18:09:56,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:56,532 INFO L470 AbstractCegarLoop]: Abstraction has 96339 states and 106479 transitions. [2021-11-13 18:09:56,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:09:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 96339 states and 106479 transitions. [2021-11-13 18:09:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-11-13 18:09:56,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:56,542 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:09:56,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:09:56,542 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:56,543 INFO L85 PathProgramCache]: Analyzing trace with hash 295544723, now seen corresponding path program 1 times [2021-11-13 18:09:56,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:56,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404873675] [2021-11-13 18:09:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:56,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:09:57,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:57,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404873675] [2021-11-13 18:09:57,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404873675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:57,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:57,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:09:57,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435663701] [2021-11-13 18:09:57,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:57,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:09:57,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:09:57,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:09:57,038 INFO L87 Difference]: Start difference. First operand 96339 states and 106479 transitions. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:01,135 INFO L93 Difference]: Finished difference Result 213121 states and 235235 transitions. [2021-11-13 18:10:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:10:01,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 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 494 [2021-11-13 18:10:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:01,262 INFO L225 Difference]: With dead ends: 213121 [2021-11-13 18:10:01,262 INFO L226 Difference]: Without dead ends: 115932 [2021-11-13 18:10:01,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:10:01,289 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 968 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2838.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.94ms SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3279.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:01,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 255 Invalid, 2349 Unknown, 0 Unchecked, 7.94ms Time], IncrementalHoareTripleChecker [447 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 3279.51ms Time] [2021-11-13 18:10:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115932 states. [2021-11-13 18:10:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115932 to 100168. [2021-11-13 18:10:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100168 states, 100167 states have (on average 1.1056735252128944) internal successors, (110752), 100167 states have internal predecessors, (110752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100168 states to 100168 states and 110752 transitions. [2021-11-13 18:10:03,103 INFO L78 Accepts]: Start accepts. Automaton has 100168 states and 110752 transitions. Word has length 494 [2021-11-13 18:10:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:03,111 INFO L470 AbstractCegarLoop]: Abstraction has 100168 states and 110752 transitions. [2021-11-13 18:10:03,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:10:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 100168 states and 110752 transitions. [2021-11-13 18:10:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-11-13 18:10:03,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:03,127 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:10:03,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:10:03,128 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:03,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1617166263, now seen corresponding path program 1 times [2021-11-13 18:10:03,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:03,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133584765] [2021-11-13 18:10:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:03,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 257 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:03,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:03,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133584765] [2021-11-13 18:10:03,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133584765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:03,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245689417] [2021-11-13 18:10:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:03,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:03,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:10:03,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:10:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:10:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:13:04,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:13:04,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245689417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:04,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:13:04,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-13 18:13:04,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421376999] [2021-11-13 18:13:04,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:04,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:13:04,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:04,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:13:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:13:04,357 INFO L87 Difference]: Start difference. First operand 100168 states and 110752 transitions. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:04,619 INFO L93 Difference]: Finished difference Result 100855 states and 111464 transitions. [2021-11-13 18:13:04,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:13:04,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 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 507 [2021-11-13 18:13:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:04,719 INFO L225 Difference]: With dead ends: 100855 [2021-11-13 18:13:04,719 INFO L226 Difference]: Without dead ends: 100428 [2021-11-13 18:13:04,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:13:04,736 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.10ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 984 IncrementalHoareTripleChecker+Unchecked, 1.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:04,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 821 Invalid, 984 Unknown, 0 Unchecked, 2.10ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 984 Unchecked, 1.90ms Time] [2021-11-13 18:13:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100428 states. [2021-11-13 18:13:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100428 to 100428. [2021-11-13 18:13:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100428 states, 100427 states have (on average 1.1056389218038973) internal successors, (111036), 100427 states have internal predecessors, (111036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100428 states to 100428 states and 111036 transitions. [2021-11-13 18:13:05,842 INFO L78 Accepts]: Start accepts. Automaton has 100428 states and 111036 transitions. Word has length 507 [2021-11-13 18:13:05,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:05,843 INFO L470 AbstractCegarLoop]: Abstraction has 100428 states and 111036 transitions. [2021-11-13 18:13:05,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 100428 states and 111036 transitions. [2021-11-13 18:13:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2021-11-13 18:13:05,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:05,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:13:05,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:06,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:13:06,055 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash -454745803, now seen corresponding path program 1 times [2021-11-13 18:13:06,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:13:06,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200582953] [2021-11-13 18:13:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:06,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:13:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 257 proven. 82 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:13:06,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:13:06,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200582953] [2021-11-13 18:13:06,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200582953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:13:06,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190778146] [2021-11-13 18:13:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:06,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:13:06,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:13:06,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:13:06,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:13:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:13:06,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-13 18:13:07,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:13:07,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190778146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:07,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:13:07,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-13 18:13:07,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561923442] [2021-11-13 18:13:07,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:07,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:13:07,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:07,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:13:07,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:13:07,257 INFO L87 Difference]: Start difference. First operand 100428 states and 111036 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:10,104 INFO L93 Difference]: Finished difference Result 211930 states and 234124 transitions. [2021-11-13 18:13:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:13:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 515 [2021-11-13 18:13:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:10,226 INFO L225 Difference]: With dead ends: 211930 [2021-11-13 18:13:10,226 INFO L226 Difference]: Without dead ends: 111077 [2021-11-13 18:13:10,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:13:10,268 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 444 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1894.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.00ms SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2256.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:10,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 785 Invalid, 1465 Unknown, 0 Unchecked, 7.00ms Time], IncrementalHoareTripleChecker [159 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 2256.59ms Time] [2021-11-13 18:13:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111077 states. [2021-11-13 18:13:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111077 to 108933. [2021-11-13 18:13:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108933 states, 108932 states have (on average 1.0963536885396394) internal successors, (119428), 108932 states have internal predecessors, (119428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108933 states to 108933 states and 119428 transitions. [2021-11-13 18:13:11,707 INFO L78 Accepts]: Start accepts. Automaton has 108933 states and 119428 transitions. Word has length 515 [2021-11-13 18:13:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:13:11,707 INFO L470 AbstractCegarLoop]: Abstraction has 108933 states and 119428 transitions. [2021-11-13 18:13:11,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 108933 states and 119428 transitions. [2021-11-13 18:13:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2021-11-13 18:13:11,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:13:11,718 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:13:11,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:13:11,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92f5dd25-0410-49e0-ba87-a0bf00c8a5c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:13:11,919 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:13:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:13:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 706653228, now seen corresponding path program 1 times [2021-11-13 18:13:11,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:13:11,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510736443] [2021-11-13 18:13:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:13:11,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:13:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 865 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-11-13 18:13:12,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:13:12,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510736443] [2021-11-13 18:13:12,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510736443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:12,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:12,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:13:12,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139825197] [2021-11-13 18:13:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:12,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:13:12,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:13:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:13:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:13:12,182 INFO L87 Difference]: Start difference. First operand 108933 states and 119428 transitions. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:13:17,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:13:17,016 INFO L93 Difference]: Finished difference Result 270212 states and 294743 transitions. [2021-11-13 18:13:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:13:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 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 531 [2021-11-13 18:13:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:13:17,198 INFO L225 Difference]: With dead ends: 270212 [2021-11-13 18:13:17,198 INFO L226 Difference]: Without dead ends: 157031 [2021-11-13 18:13:17,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:13:17,256 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 1408 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3317.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1408 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.68ms SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3933.67ms IncrementalHoareTripleChecker+Time [2021-11-13 18:13:17,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1408 Valid, 207 Invalid, 3981 Unknown, 0 Unchecked, 11.68ms Time], IncrementalHoareTripleChecker [747 Valid, 3234 Invalid, 0 Unknown, 0 Unchecked, 3933.67ms Time] [2021-11-13 18:13:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157031 states.