./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/down.i --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_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/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_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/down.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/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_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/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 d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:46:55,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:46:55,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:46:55,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:46:55,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:46:55,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:46:55,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:46:55,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:46:55,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:46:55,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:46:55,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:46:55,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:46:55,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:46:55,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:46:55,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:46:55,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:46:55,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:46:55,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:46:55,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:46:55,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:46:55,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:46:55,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:46:55,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:46:55,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:46:55,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:46:55,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:46:55,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:46:55,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:46:55,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:46:55,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:46:55,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:46:55,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:46:55,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:46:55,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:46:55,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:46:55,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:46:55,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:46:55,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:46:55,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:46:55,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:46:55,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:46:55,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:46:55,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:46:55,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:46:55,832 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:46:55,833 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:46:55,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:46:55,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:46:55,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:46:55,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:46:55,835 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:46:55,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:46:55,835 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:46:55,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:46:55,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:46:55,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:46:55,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:46:55,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:46:55,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:46:55,837 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:46:55,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:46:55,838 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:46:55,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:46:55,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:46:55,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:46:55,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:46:55,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:55,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:46:55,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:46:55,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:46:55,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:46:55,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:46:55,840 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:46:55,840 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:46:55,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:46:55,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:46:55,841 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_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 [2021-11-13 18:46:56,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:46:56,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:46:56,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:46:56,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:46:56,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:46:56,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/loop-invgen/down.i [2021-11-13 18:46:56,289 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/data/71dbd29d7/49db4422eb7a4842b6dc2831e6cbd314/FLAGf79ea2517 [2021-11-13 18:46:56,851 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:46:56,851 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/sv-benchmarks/c/loop-invgen/down.i [2021-11-13 18:46:56,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/data/71dbd29d7/49db4422eb7a4842b6dc2831e6cbd314/FLAGf79ea2517 [2021-11-13 18:46:57,235 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/data/71dbd29d7/49db4422eb7a4842b6dc2831e6cbd314 [2021-11-13 18:46:57,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:46:57,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:46:57,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:57,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:46:57,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:46:57,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7b5439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57, skipping insertion in model container [2021-11-13 18:46:57,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:46:57,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:46:57,490 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_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/sv-benchmarks/c/loop-invgen/down.i[893,906] [2021-11-13 18:46:57,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:57,511 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:46:57,525 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_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/sv-benchmarks/c/loop-invgen/down.i[893,906] [2021-11-13 18:46:57,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:46:57,544 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:46:57,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57 WrapperNode [2021-11-13 18:46:57,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:46:57,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:46:57,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:46:57,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:46:57,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:46:57,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:46:57,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:46:57,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:46:57,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:46:57,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:46:57,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:46:57,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:46:57,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (1/1) ... [2021-11-13 18:46:57,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:46:57,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:57,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:46:57,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:46:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:46:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:46:57,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:46:57,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:46:57,895 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:46:57,895 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:46:57,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:57 BoogieIcfgContainer [2021-11-13 18:46:57,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:46:57,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:46:57,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:46:57,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:46:57,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:46:57" (1/3) ... [2021-11-13 18:46:57,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31241f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:57, skipping insertion in model container [2021-11-13 18:46:57,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:46:57" (2/3) ... [2021-11-13 18:46:57,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31241f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:46:57, skipping insertion in model container [2021-11-13 18:46:57,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:46:57" (3/3) ... [2021-11-13 18:46:57,923 INFO L111 eAbstractionObserver]: Analyzing ICFG down.i [2021-11-13 18:46:57,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:46:57,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:46:58,026 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:46:58,034 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 18:46:58,035 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:46:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:46:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:46:58,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:58,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:58,057 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2021-11-13 18:46:58,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:58,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247585535] [2021-11-13 18:46:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:58,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:58,387 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 18:46:58,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:58,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247585535] [2021-11-13 18:46:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247585535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:58,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:58,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:46:58,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552168630] [2021-11-13 18:46:58,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:58,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:46:58,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:58,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:46:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:46:58,451 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:46:58,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:58,568 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-11-13 18:46:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:46:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-13 18:46:58,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:58,582 INFO L225 Difference]: With dead ends: 30 [2021-11-13 18:46:58,582 INFO L226 Difference]: Without dead ends: 10 [2021-11-13 18:46:58,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:58,599 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:58,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 57.00ms Time] [2021-11-13 18:46:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-13 18:46:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-13 18:46:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 18:46:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-13 18:46:58,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-11-13 18:46:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:58,641 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-13 18:46:58,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 18:46:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-13 18:46:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 18:46:58,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:58,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:58,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:46:58,644 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:58,649 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2021-11-13 18:46:58,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:58,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020979867] [2021-11-13 18:46:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:58,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:58,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:58,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020979867] [2021-11-13 18:46:58,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020979867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:58,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031257226] [2021-11-13 18:46:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:58,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:58,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:58,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:58,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:46:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:58,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:46:58,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:58,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:46:58,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031257226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:58,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:46:58,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-13 18:46:58,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095389620] [2021-11-13 18:46:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:58,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:46:58,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:46:59,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:46:59,001 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 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 18:46:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:59,063 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-13 18:46:59,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:46:59,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-13 18:46:59,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:59,065 INFO L225 Difference]: With dead ends: 20 [2021-11-13 18:46:59,065 INFO L226 Difference]: Without dead ends: 18 [2021-11-13 18:46:59,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:46:59,069 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:59,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 31.11ms Time] [2021-11-13 18:46:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-13 18:46:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2021-11-13 18:46:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 18:46:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-13 18:46:59,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-11-13 18:46:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:59,087 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-13 18:46:59,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 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 18:46:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-13 18:46:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:46:59,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:59,089 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:59,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:59,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:59,313 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:46:59,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:59,314 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2021-11-13 18:46:59,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:59,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893584858] [2021-11-13 18:46:59,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:59,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:59,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:59,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893584858] [2021-11-13 18:46:59,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893584858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:59,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493474091] [2021-11-13 18:46:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:59,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:59,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:59,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:46:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:59,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:46:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:59,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:46:59,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493474091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:46:59,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:46:59,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2021-11-13 18:46:59,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435596813] [2021-11-13 18:46:59,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:59,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:46:59,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:59,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:46:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:59,678 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 18:46:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:59,766 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-13 18:46:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-11-13 18:46:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:59,769 INFO L225 Difference]: With dead ends: 23 [2021-11-13 18:46:59,769 INFO L226 Difference]: Without dead ends: 13 [2021-11-13 18:46:59,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:59,774 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:59,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 28 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 30.05ms Time] [2021-11-13 18:46:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-13 18:46:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-13 18:46:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 18:46:59,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-13 18:46:59,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-13 18:46:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:59,782 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-13 18:46:59,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 18:46:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-13 18:46:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:46:59,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:59,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:59,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:00,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-13 18:47:00,005 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:00,006 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2021-11-13 18:47:00,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:00,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442171378] [2021-11-13 18:47:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:00,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:00,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:00,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442171378] [2021-11-13 18:47:00,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442171378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:00,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926377905] [2021-11-13 18:47:00,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:00,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:00,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:00,087 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:47:00,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:00,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:47:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:00,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:00,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926377905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:00,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:00,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2021-11-13 18:47:00,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962007445] [2021-11-13 18:47:00,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:00,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:47:00,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:47:00,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:47:00,254 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 18:47:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:00,321 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-11-13 18:47:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:47:00,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 12 [2021-11-13 18:47:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:00,322 INFO L225 Difference]: With dead ends: 24 [2021-11-13 18:47:00,323 INFO L226 Difference]: Without dead ends: 22 [2021-11-13 18:47:00,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:47:00,324 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.35ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:00,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 43 Unknown, 0 Unchecked, 1.35ms Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 30.76ms Time] [2021-11-13 18:47:00,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-13 18:47:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2021-11-13 18:47:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:47:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-13 18:47:00,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-11-13 18:47:00,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-13 18:47:00,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 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 18:47:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-13 18:47:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:47:00,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:00,331 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:00,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:00,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:00,552 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:00,553 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2021-11-13 18:47:00,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:00,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477945394] [2021-11-13 18:47:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:00,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:00,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:00,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477945394] [2021-11-13 18:47:00,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477945394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:00,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904775904] [2021-11-13 18:47:00,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:00,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:00,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:00,638 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:00,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:47:00,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:47:00,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:47:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:00,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904775904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:00,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:00,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2021-11-13 18:47:00,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476034716] [2021-11-13 18:47:00,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:00,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:47:00,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:00,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:47:00,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:47:00,790 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:47:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:00,864 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-13 18:47:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:47:00,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 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 15 [2021-11-13 18:47:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:00,865 INFO L225 Difference]: With dead ends: 30 [2021-11-13 18:47:00,865 INFO L226 Difference]: Without dead ends: 17 [2021-11-13 18:47:00,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:47:00,867 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:00,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 45 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 34.64ms Time] [2021-11-13 18:47:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-13 18:47:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-13 18:47:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 18:47:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-13 18:47:00,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-11-13 18:47:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:00,872 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-13 18:47:00,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 18:47:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-13 18:47:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 18:47:00,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:00,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:00,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:01,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:01,105 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2021-11-13 18:47:01,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:01,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252307590] [2021-11-13 18:47:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:01,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:01,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:01,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252307590] [2021-11-13 18:47:01,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252307590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:01,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731710803] [2021-11-13 18:47:01,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:01,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:01,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:01,202 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:01,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:47:01,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:01,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:47:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:01,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:01,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731710803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:01,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:01,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-11-13 18:47:01,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408793228] [2021-11-13 18:47:01,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:01,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:47:01,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:47:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:47:01,449 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 18:47:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:01,540 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-13 18:47:01,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:47:01,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 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 18:47:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:01,544 INFO L225 Difference]: With dead ends: 28 [2021-11-13 18:47:01,544 INFO L226 Difference]: Without dead ends: 26 [2021-11-13 18:47:01,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:47:01,548 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.63ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:01,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 61 Unknown, 0 Unchecked, 4.63ms Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 38.91ms Time] [2021-11-13 18:47:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-13 18:47:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2021-11-13 18:47:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:47:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-13 18:47:01,560 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2021-11-13 18:47:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:01,561 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-13 18:47:01,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 18:47:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-13 18:47:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 18:47:01,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:01,563 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:01,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 18:47:01,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 18:47:01,789 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:01,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2021-11-13 18:47:01,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:01,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526606888] [2021-11-13 18:47:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:01,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:01,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:01,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526606888] [2021-11-13 18:47:01,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526606888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:01,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234774694] [2021-11-13 18:47:01,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:01,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:01,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:01,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:01,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:47:01,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-13 18:47:01,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:01,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:47:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:02,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:02,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234774694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:02,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:02,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2021-11-13 18:47:02,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420393156] [2021-11-13 18:47:02,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:02,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:47:02,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:02,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:47:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:47:02,083 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:47:02,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:02,167 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-11-13 18:47:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:47:02,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 19 [2021-11-13 18:47:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:02,168 INFO L225 Difference]: With dead ends: 37 [2021-11-13 18:47:02,168 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 18:47:02,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:47:02,170 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:02,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 50 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 31.35ms Time] [2021-11-13 18:47:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 18:47:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-13 18:47:02,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:47:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-11-13 18:47:02,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-11-13 18:47:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:02,175 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-11-13 18:47:02,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 18:47:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-11-13 18:47:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:47:02,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:02,176 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:02,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:02,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:02,390 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:02,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:02,390 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2021-11-13 18:47:02,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:02,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047761758] [2021-11-13 18:47:02,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:02,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:02,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:02,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047761758] [2021-11-13 18:47:02,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047761758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:02,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243143805] [2021-11-13 18:47:02,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:02,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:02,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:02,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:02,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:47:02,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-13 18:47:02,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:02,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:47:02,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:02,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:02,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243143805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:02,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:02,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2021-11-13 18:47:02,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742236405] [2021-11-13 18:47:02,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:02,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:47:02,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:02,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:47:02,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:47:02,680 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:47:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:02,784 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-13 18:47:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:47:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 20 [2021-11-13 18:47:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:02,786 INFO L225 Difference]: With dead ends: 32 [2021-11-13 18:47:02,786 INFO L226 Difference]: Without dead ends: 30 [2021-11-13 18:47:02,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:47:02,787 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:02,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 74 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [20 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 47.65ms Time] [2021-11-13 18:47:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-13 18:47:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-11-13 18:47:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:47:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-13 18:47:02,793 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-11-13 18:47:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:02,794 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-13 18:47:02,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 18:47:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-13 18:47:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:47:02,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:02,795 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:02,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:03,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:03,024 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:03,024 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2021-11-13 18:47:03,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:03,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448687398] [2021-11-13 18:47:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:03,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:03,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:03,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448687398] [2021-11-13 18:47:03,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448687398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:03,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190517506] [2021-11-13 18:47:03,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:03,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:03,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:03,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:03,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:47:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:03,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:47:03,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:03,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:03,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190517506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:03,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:03,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2021-11-13 18:47:03,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435377464] [2021-11-13 18:47:03,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:03,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:47:03,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:03,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:47:03,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:47:03,394 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:47:03,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:03,507 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-11-13 18:47:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:47:03,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 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 23 [2021-11-13 18:47:03,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:03,509 INFO L225 Difference]: With dead ends: 44 [2021-11-13 18:47:03,510 INFO L226 Difference]: Without dead ends: 25 [2021-11-13 18:47:03,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:47:03,512 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:03,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 53 Invalid, 78 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 45.72ms Time] [2021-11-13 18:47:03,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-13 18:47:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-13 18:47:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 18:47:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-13 18:47:03,521 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2021-11-13 18:47:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:03,521 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-13 18:47:03,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 18:47:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-13 18:47:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:47:03,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:03,523 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:03,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:03,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:03,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2021-11-13 18:47:03,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:03,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345996963] [2021-11-13 18:47:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:03,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:03,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:03,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345996963] [2021-11-13 18:47:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345996963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:03,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810699811] [2021-11-13 18:47:03,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:03,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:03,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:03,861 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:03,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:47:03,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:03,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:03,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:47:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:03,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:04,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810699811] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:04,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:04,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2021-11-13 18:47:04,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700582173] [2021-11-13 18:47:04,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:04,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:47:04,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:04,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:47:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:47:04,099 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 18:47:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:04,229 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-13 18:47:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:47:04,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-13 18:47:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:04,234 INFO L225 Difference]: With dead ends: 36 [2021-11-13 18:47:04,234 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 18:47:04,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:47:04,235 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:04,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 81 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 55.70ms Time] [2021-11-13 18:47:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 18:47:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-11-13 18:47:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:47:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-13 18:47:04,245 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2021-11-13 18:47:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:04,246 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-13 18:47:04,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 18:47:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-13 18:47:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:47:04,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:04,247 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:04,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:04,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:04,457 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2021-11-13 18:47:04,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:04,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661478249] [2021-11-13 18:47:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:04,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:04,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:04,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661478249] [2021-11-13 18:47:04,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661478249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:04,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874099078] [2021-11-13 18:47:04,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:04,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:04,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:04,600 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:04,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:47:04,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 18:47:04,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:47:04,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:04,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:04,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874099078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:04,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:04,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2021-11-13 18:47:04,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845010059] [2021-11-13 18:47:04,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:04,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:47:04,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:04,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:47:04,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:47:04,857 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:47:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:05,014 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-13 18:47:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:47:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 27 [2021-11-13 18:47:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:05,018 INFO L225 Difference]: With dead ends: 51 [2021-11-13 18:47:05,018 INFO L226 Difference]: Without dead ends: 29 [2021-11-13 18:47:05,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:47:05,020 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:05,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 82 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 58.31ms Time] [2021-11-13 18:47:05,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-13 18:47:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-13 18:47:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 18:47:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-13 18:47:05,036 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2021-11-13 18:47:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:05,036 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-13 18:47:05,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 18:47:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-13 18:47:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:47:05,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:05,037 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:05,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:05,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:47:05,255 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2021-11-13 18:47:05,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:05,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117294601] [2021-11-13 18:47:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:05,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:05,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:05,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117294601] [2021-11-13 18:47:05,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117294601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:05,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277441666] [2021-11-13 18:47:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:05,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:05,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:05,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:05,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:47:05,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:05,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:47:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:05,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:05,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277441666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:05,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:05,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2021-11-13 18:47:05,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240829099] [2021-11-13 18:47:05,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:05,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:47:05,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:47:05,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:47:05,657 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 18:47:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:05,793 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-13 18:47:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:47:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 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 28 [2021-11-13 18:47:05,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:05,795 INFO L225 Difference]: With dead ends: 40 [2021-11-13 18:47:05,795 INFO L226 Difference]: Without dead ends: 38 [2021-11-13 18:47:05,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:47:05,799 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:05,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 35 Invalid, 94 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [23 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 65.08ms Time] [2021-11-13 18:47:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-13 18:47:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-11-13 18:47:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:47:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-13 18:47:05,816 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2021-11-13 18:47:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:05,816 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-13 18:47:05,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 18:47:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-13 18:47:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:47:05,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:05,823 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:05,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:06,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:47:06,041 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2021-11-13 18:47:06,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:06,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778199219] [2021-11-13 18:47:06,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:06,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:06,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:06,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778199219] [2021-11-13 18:47:06,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778199219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:06,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932502668] [2021-11-13 18:47:06,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:06,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:06,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:06,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:06,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:47:06,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-13 18:47:06,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:06,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:47:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:06,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:06,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932502668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:06,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:06,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2021-11-13 18:47:06,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304060367] [2021-11-13 18:47:06,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:06,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:47:06,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:47:06,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:47:06,484 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:47:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:06,629 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-11-13 18:47:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:47:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 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 31 [2021-11-13 18:47:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:06,630 INFO L225 Difference]: With dead ends: 58 [2021-11-13 18:47:06,630 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 18:47:06,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:47:06,632 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:06,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 88 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 50.43ms Time] [2021-11-13 18:47:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 18:47:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-13 18:47:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 18:47:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-11-13 18:47:06,638 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2021-11-13 18:47:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:06,638 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-11-13 18:47:06,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:47:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-11-13 18:47:06,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:47:06,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:06,640 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:06,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:06,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:06,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2021-11-13 18:47:06,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:06,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203899610] [2021-11-13 18:47:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:06,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:07,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:07,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203899610] [2021-11-13 18:47:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203899610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:07,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779717421] [2021-11-13 18:47:07,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:07,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:07,009 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:07,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:47:07,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-13 18:47:07,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:47:07,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:07,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:07,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779717421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:07,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:07,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2021-11-13 18:47:07,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444290860] [2021-11-13 18:47:07,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:07,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:47:07,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:47:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:47:07,294 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 18:47:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:07,449 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-13 18:47:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:47:07,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 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 32 [2021-11-13 18:47:07,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:07,450 INFO L225 Difference]: With dead ends: 44 [2021-11-13 18:47:07,450 INFO L226 Difference]: Without dead ends: 42 [2021-11-13 18:47:07,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:47:07,451 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:07,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 118 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [32 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 71.53ms Time] [2021-11-13 18:47:07,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-13 18:47:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-11-13 18:47:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-13 18:47:07,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2021-11-13 18:47:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:07,458 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-13 18:47:07,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 18:47:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-13 18:47:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:47:07,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:07,459 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:07,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:07,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:07,677 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:07,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2021-11-13 18:47:07,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:07,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127987678] [2021-11-13 18:47:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:07,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:07,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:07,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127987678] [2021-11-13 18:47:07,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127987678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:07,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098589129] [2021-11-13 18:47:07,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:07,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:07,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:07,854 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:07,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:47:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:07,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:47:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:08,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:08,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098589129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:08,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:08,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 20 [2021-11-13 18:47:08,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844023860] [2021-11-13 18:47:08,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:08,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:47:08,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:08,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:47:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:47:08,155 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:08,332 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-11-13 18:47:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:47:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-13 18:47:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:08,333 INFO L225 Difference]: With dead ends: 65 [2021-11-13 18:47:08,333 INFO L226 Difference]: Without dead ends: 37 [2021-11-13 18:47:08,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:47:08,334 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:08,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 109 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 58.65ms Time] [2021-11-13 18:47:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-13 18:47:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-13 18:47:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-13 18:47:08,340 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2021-11-13 18:47:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:08,346 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-13 18:47:08,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-13 18:47:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:47:08,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:08,348 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:08,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:08,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:08,565 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2021-11-13 18:47:08,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:08,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264076339] [2021-11-13 18:47:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:08,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:08,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:08,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264076339] [2021-11-13 18:47:08,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264076339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:08,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660883056] [2021-11-13 18:47:08,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:08,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:08,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:08,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:08,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:47:08,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:08,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:08,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:47:08,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:08,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:08,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660883056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:08,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:08,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2021-11-13 18:47:08,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449790626] [2021-11-13 18:47:08,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:08,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:47:08,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:08,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:47:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:47:08,979 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:09,137 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-11-13 18:47:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:47:09,138 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-13 18:47:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:09,138 INFO L225 Difference]: With dead ends: 48 [2021-11-13 18:47:09,138 INFO L226 Difference]: Without dead ends: 46 [2021-11-13 18:47:09,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:47:09,140 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.02ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:09,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 22 Invalid, 124 Unknown, 0 Unchecked, 1.02ms Time], IncrementalHoareTripleChecker [44 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 70.47ms Time] [2021-11-13 18:47:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-13 18:47:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-11-13 18:47:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-13 18:47:09,147 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2021-11-13 18:47:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:09,147 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-13 18:47:09,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-13 18:47:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:47:09,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:09,148 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:09,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:09,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:47:09,373 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:09,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2021-11-13 18:47:09,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:09,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131516716] [2021-11-13 18:47:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:09,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:09,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:09,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131516716] [2021-11-13 18:47:09,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131516716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:09,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390053454] [2021-11-13 18:47:09,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:09,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:09,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:09,609 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:09,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:47:09,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 18:47:09,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:09,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:47:09,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:09,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:09,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390053454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:09,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:09,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 22 [2021-11-13 18:47:09,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242405817] [2021-11-13 18:47:09,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:09,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:47:09,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:47:09,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:47:09,946 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:10,140 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2021-11-13 18:47:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:47:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-13 18:47:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:10,141 INFO L225 Difference]: With dead ends: 72 [2021-11-13 18:47:10,141 INFO L226 Difference]: Without dead ends: 41 [2021-11-13 18:47:10,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:47:10,144 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:10,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 132 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 66.43ms Time] [2021-11-13 18:47:10,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-13 18:47:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-13 18:47:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 18:47:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-13 18:47:10,151 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2021-11-13 18:47:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:10,152 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-13 18:47:10,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-13 18:47:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:47:10,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:10,153 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:10,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:10,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:47:10,381 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:10,381 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2021-11-13 18:47:10,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:10,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850549058] [2021-11-13 18:47:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:10,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:10,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:10,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850549058] [2021-11-13 18:47:10,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850549058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:10,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581109600] [2021-11-13 18:47:10,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:10,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:10,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:10,517 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:10,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:47:10,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:10,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:47:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:10,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:10,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581109600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:10,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:10,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2021-11-13 18:47:10,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017532271] [2021-11-13 18:47:10,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:10,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:47:10,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:10,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:47:10,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:47:10,869 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:11,068 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-13 18:47:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:47:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-13 18:47:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:11,069 INFO L225 Difference]: With dead ends: 52 [2021-11-13 18:47:11,069 INFO L226 Difference]: Without dead ends: 50 [2021-11-13 18:47:11,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:47:11,070 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:11,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 37 Invalid, 138 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [32 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 81.28ms Time] [2021-11-13 18:47:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-13 18:47:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-11-13 18:47:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 18:47:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-13 18:47:11,085 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2021-11-13 18:47:11,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:11,086 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-13 18:47:11,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-13 18:47:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:47:11,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:11,088 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:11,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:11,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:47:11,313 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:11,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2021-11-13 18:47:11,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:11,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731100725] [2021-11-13 18:47:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:11,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:11,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:11,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731100725] [2021-11-13 18:47:11,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731100725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:11,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661058070] [2021-11-13 18:47:11,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:11,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:11,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:11,571 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:11,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:47:11,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-13 18:47:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:11,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:47:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:11,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:11,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661058070] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:11,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:11,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 24 [2021-11-13 18:47:11,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462971001] [2021-11-13 18:47:11,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:11,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 18:47:11,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 18:47:11,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:47:11,899 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 18:47:12,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:12,137 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-11-13 18:47:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:47:12,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-13 18:47:12,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:12,138 INFO L225 Difference]: With dead ends: 79 [2021-11-13 18:47:12,138 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:47:12,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:47:12,140 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:12,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 126 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 72.74ms Time] [2021-11-13 18:47:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:47:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-13 18:47:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 18:47:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-13 18:47:12,148 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2021-11-13 18:47:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:12,148 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-13 18:47:12,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 18:47:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-13 18:47:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:47:12,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:12,149 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:12,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:12,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:12,369 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:12,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2021-11-13 18:47:12,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:12,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274900617] [2021-11-13 18:47:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:12,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:12,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:12,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274900617] [2021-11-13 18:47:12,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274900617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:12,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766167946] [2021-11-13 18:47:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:12,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:12,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:12,551 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:12,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:47:12,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-13 18:47:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:47:12,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:12,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:12,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766167946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:12,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:12,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2021-11-13 18:47:12,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994846102] [2021-11-13 18:47:12,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:12,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:47:12,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:12,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:47:12,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:47:12,884 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 18:47:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:13,076 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-13 18:47:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:47:13,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-13 18:47:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:13,077 INFO L225 Difference]: With dead ends: 56 [2021-11-13 18:47:13,077 INFO L226 Difference]: Without dead ends: 54 [2021-11-13 18:47:13,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:47:13,079 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:13,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 30 Invalid, 154 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [44 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 81.64ms Time] [2021-11-13 18:47:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-13 18:47:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-11-13 18:47:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-13 18:47:13,085 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2021-11-13 18:47:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:13,085 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-13 18:47:13,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 18:47:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-13 18:47:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 18:47:13,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:13,086 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:13,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:13,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:13,301 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2021-11-13 18:47:13,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:13,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58800644] [2021-11-13 18:47:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:13,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:13,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:13,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58800644] [2021-11-13 18:47:13,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58800644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:13,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133903343] [2021-11-13 18:47:13,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:13,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:13,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:13,589 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:13,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:47:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:13,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 18:47:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:13,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:13,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133903343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:13,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:13,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2021-11-13 18:47:13,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378559613] [2021-11-13 18:47:13,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:13,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:47:13,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:47:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:47:13,949 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:14,251 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-11-13 18:47:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:47:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-13 18:47:14,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:14,252 INFO L225 Difference]: With dead ends: 86 [2021-11-13 18:47:14,252 INFO L226 Difference]: Without dead ends: 49 [2021-11-13 18:47:14,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:47:14,255 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:14,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 162 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 101.26ms Time] [2021-11-13 18:47:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-13 18:47:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-13 18:47:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 18:47:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-13 18:47:14,267 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2021-11-13 18:47:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:14,267 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-13 18:47:14,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-13 18:47:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:47:14,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:14,270 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:14,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:14,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 18:47:14,485 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:14,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2021-11-13 18:47:14,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:14,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531901598] [2021-11-13 18:47:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:14,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:14,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:14,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531901598] [2021-11-13 18:47:14,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531901598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:14,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844746825] [2021-11-13 18:47:14,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:14,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:14,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:14,690 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:14,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 18:47:14,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:14,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:47:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:14,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844746825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:15,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:15,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2021-11-13 18:47:15,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349715288] [2021-11-13 18:47:15,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:15,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:47:15,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:15,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:47:15,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:47:15,090 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 18:47:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:15,328 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-11-13 18:47:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 18:47:15,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 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 48 [2021-11-13 18:47:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:15,329 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:47:15,330 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 18:47:15,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:47:15,331 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:15,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 23 Invalid, 154 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [49 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 101.15ms Time] [2021-11-13 18:47:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 18:47:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-11-13 18:47:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 18:47:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-13 18:47:15,339 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2021-11-13 18:47:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:15,339 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-13 18:47:15,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 18:47:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-13 18:47:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:47:15,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:15,341 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:15,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:15,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:15,557 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2021-11-13 18:47:15,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:15,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854638796] [2021-11-13 18:47:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:15,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:15,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:15,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854638796] [2021-11-13 18:47:15,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854638796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:15,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662453053] [2021-11-13 18:47:15,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:15,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:15,890 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:15,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:47:15,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-13 18:47:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:47:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:16,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:16,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662453053] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:16,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:16,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 28 [2021-11-13 18:47:16,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985571496] [2021-11-13 18:47:16,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:16,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-13 18:47:16,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-13 18:47:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:47:16,286 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 18:47:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:16,569 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-11-13 18:47:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:47:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 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 51 [2021-11-13 18:47:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:16,569 INFO L225 Difference]: With dead ends: 93 [2021-11-13 18:47:16,570 INFO L226 Difference]: Without dead ends: 53 [2021-11-13 18:47:16,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:47:16,571 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:16,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 97 Invalid, 173 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 88.37ms Time] [2021-11-13 18:47:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-13 18:47:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-13 18:47:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 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 18:47:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-13 18:47:16,578 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2021-11-13 18:47:16,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:16,578 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-13 18:47:16,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 18:47:16,579 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-13 18:47:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-13 18:47:16,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:16,580 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:16,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-13 18:47:16,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:47:16,793 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2021-11-13 18:47:16,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:16,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829718277] [2021-11-13 18:47:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:16,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:16,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:16,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829718277] [2021-11-13 18:47:16,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829718277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:16,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579044298] [2021-11-13 18:47:16,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:16,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:16,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:16,958 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:16,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:47:17,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:17,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:47:17,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:17,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:17,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579044298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:17,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:17,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2021-11-13 18:47:17,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049178750] [2021-11-13 18:47:17,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:17,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:47:17,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:17,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:47:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:47:17,307 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 18:47:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:17,542 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-13 18:47:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:47:17,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 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 52 [2021-11-13 18:47:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:17,543 INFO L225 Difference]: With dead ends: 64 [2021-11-13 18:47:17,543 INFO L226 Difference]: Without dead ends: 62 [2021-11-13 18:47:17,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:47:17,545 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:17,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 34 Invalid, 185 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [64 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 111.65ms Time] [2021-11-13 18:47:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-13 18:47:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-13 18:47:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:47:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-13 18:47:17,552 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2021-11-13 18:47:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:17,553 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-13 18:47:17,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 18:47:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-13 18:47:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:47:17,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:17,554 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:17,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:17,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:17,777 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2021-11-13 18:47:17,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:17,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833510166] [2021-11-13 18:47:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:17,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:18,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:18,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833510166] [2021-11-13 18:47:18,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833510166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:18,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389243669] [2021-11-13 18:47:18,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:18,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:18,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:18,078 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:18,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 18:47:18,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-13 18:47:18,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:47:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:18,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:18,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389243669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:18,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:18,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 30 [2021-11-13 18:47:18,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286963799] [2021-11-13 18:47:18,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:18,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-13 18:47:18,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:18,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-13 18:47:18,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:47:18,483 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:47:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:18,802 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-11-13 18:47:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 18:47:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 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 55 [2021-11-13 18:47:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:18,803 INFO L225 Difference]: With dead ends: 100 [2021-11-13 18:47:18,803 INFO L226 Difference]: Without dead ends: 57 [2021-11-13 18:47:18,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:47:18,805 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:18,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 123 Invalid, 247 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 107.34ms Time] [2021-11-13 18:47:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-13 18:47:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-13 18:47:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:47:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-11-13 18:47:18,812 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2021-11-13 18:47:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:18,813 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-11-13 18:47:18,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:47:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-11-13 18:47:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:47:18,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:18,814 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:18,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:19,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-13 18:47:19,029 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:19,029 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2021-11-13 18:47:19,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:19,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074934793] [2021-11-13 18:47:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:19,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:19,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:19,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074934793] [2021-11-13 18:47:19,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074934793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:19,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426478884] [2021-11-13 18:47:19,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:19,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:19,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:19,219 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:19,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 18:47:19,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-13 18:47:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:19,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:47:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:19,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:19,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426478884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:19,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:19,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2021-11-13 18:47:19,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239717173] [2021-11-13 18:47:19,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:19,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:47:19,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:47:19,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:47:19,653 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:19,850 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-13 18:47:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 18:47:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-13 18:47:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:19,851 INFO L225 Difference]: With dead ends: 68 [2021-11-13 18:47:19,851 INFO L226 Difference]: Without dead ends: 66 [2021-11-13 18:47:19,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:47:19,852 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:19,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 31 Invalid, 197 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [69 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 87.93ms Time] [2021-11-13 18:47:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-13 18:47:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-11-13 18:47:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-13 18:47:19,860 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2021-11-13 18:47:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:19,860 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-13 18:47:19,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-13 18:47:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:47:19,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:19,862 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:19,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-13 18:47:20,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 18:47:20,066 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:20,066 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2021-11-13 18:47:20,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:20,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448825461] [2021-11-13 18:47:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:20,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:20,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448825461] [2021-11-13 18:47:20,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448825461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428403502] [2021-11-13 18:47:20,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:20,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:20,430 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:20,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 18:47:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:47:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:20,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:20,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428403502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:20,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:20,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 32 [2021-11-13 18:47:20,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357101586] [2021-11-13 18:47:20,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:20,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:47:20,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:47:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:47:20,785 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:21,135 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-11-13 18:47:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:47:21,136 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-13 18:47:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:21,136 INFO L225 Difference]: With dead ends: 107 [2021-11-13 18:47:21,136 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 18:47:21,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:47:21,138 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.35ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:21,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 147 Invalid, 261 Unknown, 0 Unchecked, 2.35ms Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 112.93ms Time] [2021-11-13 18:47:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 18:47:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-13 18:47:21,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-11-13 18:47:21,149 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2021-11-13 18:47:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:21,150 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-11-13 18:47:21,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-11-13 18:47:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 18:47:21,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:21,151 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:21,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:21,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 18:47:21,377 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:21,377 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2021-11-13 18:47:21,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:21,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336908881] [2021-11-13 18:47:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:21,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:21,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:21,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336908881] [2021-11-13 18:47:21,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336908881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:21,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629873727] [2021-11-13 18:47:21,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:21,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:21,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:21,573 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:21,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-13 18:47:21,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:21,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:21,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:47:21,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:21,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:21,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629873727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:21,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:21,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2021-11-13 18:47:21,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874685244] [2021-11-13 18:47:21,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:21,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:47:21,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:47:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:47:21,990 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:47:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:22,225 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-11-13 18:47:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:47:22,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 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 60 [2021-11-13 18:47:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:22,226 INFO L225 Difference]: With dead ends: 72 [2021-11-13 18:47:22,226 INFO L226 Difference]: Without dead ends: 70 [2021-11-13 18:47:22,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:47:22,227 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:22,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 31 Invalid, 209 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [74 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 105.46ms Time] [2021-11-13 18:47:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-13 18:47:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-11-13 18:47:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:47:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-13 18:47:22,233 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2021-11-13 18:47:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:22,233 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-13 18:47:22,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:47:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-13 18:47:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 18:47:22,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:22,235 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:22,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:22,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 18:47:22,441 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:22,441 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2021-11-13 18:47:22,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:22,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555060316] [2021-11-13 18:47:22,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:22,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:22,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:22,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555060316] [2021-11-13 18:47:22,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555060316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:22,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021631177] [2021-11-13 18:47:22,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:22,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:22,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:22,790 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:22,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-13 18:47:22,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-13 18:47:22,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 18:47:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:23,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:23,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021631177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:23,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:23,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 34 [2021-11-13 18:47:23,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292190525] [2021-11-13 18:47:23,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:23,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:47:23,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:23,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:47:23,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:47:23,181 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:47:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:23,570 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-11-13 18:47:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 18:47:23,571 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 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 63 [2021-11-13 18:47:23,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:23,572 INFO L225 Difference]: With dead ends: 114 [2021-11-13 18:47:23,572 INFO L226 Difference]: Without dead ends: 65 [2021-11-13 18:47:23,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=594, Invalid=1856, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:47:23,580 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:23,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 268 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [6 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 116.22ms Time] [2021-11-13 18:47:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-13 18:47:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-13 18:47:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 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 18:47:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-11-13 18:47:23,610 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2021-11-13 18:47:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:23,610 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-11-13 18:47:23,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:47:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-11-13 18:47:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:47:23,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:23,611 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:23,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-13 18:47:23,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:47:23,833 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:23,833 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2021-11-13 18:47:23,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:23,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074399925] [2021-11-13 18:47:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:23,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:24,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:24,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074399925] [2021-11-13 18:47:24,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074399925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:24,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423134597] [2021-11-13 18:47:24,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:24,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:24,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:24,058 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:24,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-13 18:47:24,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:24,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 18:47:24,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:24,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:24,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423134597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:24,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:24,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2021-11-13 18:47:24,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622429323] [2021-11-13 18:47:24,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:24,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:47:24,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:47:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:47:24,535 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 18:47:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:24,838 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-13 18:47:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-13 18:47:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 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 64 [2021-11-13 18:47:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:24,840 INFO L225 Difference]: With dead ends: 76 [2021-11-13 18:47:24,840 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 18:47:24,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:47:24,841 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:24,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 33 Invalid, 235 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [64 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 128.16ms Time] [2021-11-13 18:47:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 18:47:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-11-13 18:47:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:47:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-13 18:47:24,850 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2021-11-13 18:47:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:24,851 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-13 18:47:24,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 18:47:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-13 18:47:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:47:24,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:24,852 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:24,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:25,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:25,069 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2021-11-13 18:47:25,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:25,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55436089] [2021-11-13 18:47:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:25,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:25,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:25,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55436089] [2021-11-13 18:47:25,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55436089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:25,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63284728] [2021-11-13 18:47:25,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:25,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:25,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:25,533 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:25,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-13 18:47:25,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-13 18:47:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 18:47:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:25,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:26,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63284728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:26,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:26,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 36 [2021-11-13 18:47:26,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330021304] [2021-11-13 18:47:26,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:26,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:47:26,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:47:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:47:26,035 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:47:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:26,393 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2021-11-13 18:47:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:47:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 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 67 [2021-11-13 18:47:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:26,394 INFO L225 Difference]: With dead ends: 121 [2021-11-13 18:47:26,394 INFO L226 Difference]: Without dead ends: 69 [2021-11-13 18:47:26,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:47:26,396 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.30ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:26,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 187 Unknown, 0 Unchecked, 1.30ms Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 97.10ms Time] [2021-11-13 18:47:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-13 18:47:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-13 18:47:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 18:47:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-13 18:47:26,402 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2021-11-13 18:47:26,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:26,402 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-13 18:47:26,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:47:26,402 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-13 18:47:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:47:26,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:26,403 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:26,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:26,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:26,625 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2021-11-13 18:47:26,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:26,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489764674] [2021-11-13 18:47:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:26,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:26,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:26,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489764674] [2021-11-13 18:47:26,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489764674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:26,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314299664] [2021-11-13 18:47:26,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:26,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:26,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:26,848 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:26,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-13 18:47:26,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-13 18:47:26,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-13 18:47:26,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:27,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:27,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314299664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:27,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:27,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2021-11-13 18:47:27,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693969844] [2021-11-13 18:47:27,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:27,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:47:27,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:27,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:47:27,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:47:27,308 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 18:47:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:27,616 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-11-13 18:47:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 18:47:27,617 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 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 68 [2021-11-13 18:47:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:27,618 INFO L225 Difference]: With dead ends: 80 [2021-11-13 18:47:27,618 INFO L226 Difference]: Without dead ends: 78 [2021-11-13 18:47:27,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:47:27,621 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:27,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 215 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [53 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 121.39ms Time] [2021-11-13 18:47:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-13 18:47:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-11-13 18:47:27,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:47:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-13 18:47:27,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2021-11-13 18:47:27,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:27,632 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-13 18:47:27,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 18:47:27,632 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-13 18:47:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 18:47:27,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:27,633 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:27,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-13 18:47:27,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:27,845 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2021-11-13 18:47:27,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:27,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932320473] [2021-11-13 18:47:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:27,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:28,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:28,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932320473] [2021-11-13 18:47:28,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932320473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:28,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821514851] [2021-11-13 18:47:28,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:28,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:28,345 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:28,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-13 18:47:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:28,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 18:47:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:28,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:28,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821514851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:28,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:28,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 38 [2021-11-13 18:47:28,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571833224] [2021-11-13 18:47:28,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:28,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 18:47:28,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 18:47:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:47:28,835 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:47:29,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:29,250 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-11-13 18:47:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-13 18:47:29,250 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 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 71 [2021-11-13 18:47:29,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:29,251 INFO L225 Difference]: With dead ends: 128 [2021-11-13 18:47:29,251 INFO L226 Difference]: Without dead ends: 73 [2021-11-13 18:47:29,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=740, Invalid=2340, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 18:47:29,253 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:29,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 121 Invalid, 233 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 122.31ms Time] [2021-11-13 18:47:29,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-13 18:47:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-13 18:47:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 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 18:47:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-11-13 18:47:29,264 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2021-11-13 18:47:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:29,265 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-11-13 18:47:29,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 18:47:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-11-13 18:47:29,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 18:47:29,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:29,266 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:29,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:29,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:29,473 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:29,473 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2021-11-13 18:47:29,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:29,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646320188] [2021-11-13 18:47:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:29,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:29,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:29,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646320188] [2021-11-13 18:47:29,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646320188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:29,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582888599] [2021-11-13 18:47:29,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:29,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:29,738 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:29,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-13 18:47:29,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:29,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 18:47:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:30,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:30,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582888599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:30,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:30,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2021-11-13 18:47:30,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933142794] [2021-11-13 18:47:30,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:30,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:47:30,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:47:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:47:30,260 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 18:47:30,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:30,607 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-11-13 18:47:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 18:47:30,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 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 72 [2021-11-13 18:47:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:30,608 INFO L225 Difference]: With dead ends: 84 [2021-11-13 18:47:30,608 INFO L226 Difference]: Without dead ends: 82 [2021-11-13 18:47:30,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:47:30,609 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 84 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:30,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 31 Invalid, 260 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [89 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 128.70ms Time] [2021-11-13 18:47:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-13 18:47:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2021-11-13 18:47:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:47:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-11-13 18:47:30,617 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2021-11-13 18:47:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:30,617 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-11-13 18:47:30,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 18:47:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-11-13 18:47:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 18:47:30,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:30,618 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:30,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:30,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-13 18:47:30,818 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:30,819 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2021-11-13 18:47:30,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:30,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966983466] [2021-11-13 18:47:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:30,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:31,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:31,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966983466] [2021-11-13 18:47:31,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966983466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:31,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550575703] [2021-11-13 18:47:31,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:31,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:31,321 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:31,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-13 18:47:31,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-13 18:47:31,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:31,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-13 18:47:31,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:31,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:31,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550575703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:31,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:31,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 40 [2021-11-13 18:47:31,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085154174] [2021-11-13 18:47:31,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:31,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-13 18:47:31,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:31,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-13 18:47:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:47:31,826 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:47:32,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:32,395 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-11-13 18:47:32,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 18:47:32,396 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-11-13 18:47:32,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:32,397 INFO L225 Difference]: With dead ends: 135 [2021-11-13 18:47:32,397 INFO L226 Difference]: Without dead ends: 77 [2021-11-13 18:47:32,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=819, Invalid=2603, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:47:32,399 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:32,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 408 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [6 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 183.13ms Time] [2021-11-13 18:47:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-13 18:47:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-13 18:47:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 18:47:32,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-11-13 18:47:32,410 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2021-11-13 18:47:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:32,410 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-11-13 18:47:32,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:47:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-11-13 18:47:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 18:47:32,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:32,412 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:32,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:32,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-13 18:47:32,625 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2021-11-13 18:47:32,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:32,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869148837] [2021-11-13 18:47:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:32,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:32,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:32,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869148837] [2021-11-13 18:47:32,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869148837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:32,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531301758] [2021-11-13 18:47:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:32,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:32,913 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:32,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-13 18:47:32,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:32,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 18:47:32,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:33,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:33,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531301758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:33,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:33,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2021-11-13 18:47:33,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251733512] [2021-11-13 18:47:33,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:33,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 18:47:33,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:33,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 18:47:33,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:47:33,399 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 18:47:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:33,751 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-13 18:47:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 18:47:33,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 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 76 [2021-11-13 18:47:33,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:33,753 INFO L225 Difference]: With dead ends: 88 [2021-11-13 18:47:33,753 INFO L226 Difference]: Without dead ends: 86 [2021-11-13 18:47:33,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:47:33,754 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:33,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 242 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [77 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 126.68ms Time] [2021-11-13 18:47:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-13 18:47:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-11-13 18:47:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 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 18:47:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-11-13 18:47:33,766 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2021-11-13 18:47:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:33,766 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-11-13 18:47:33,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 18:47:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-11-13 18:47:33,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-13 18:47:33,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:33,767 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:33,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:33,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-13 18:47:33,981 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:33,981 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2021-11-13 18:47:33,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:33,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659446319] [2021-11-13 18:47:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:33,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:34,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:34,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659446319] [2021-11-13 18:47:34,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659446319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:34,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005081243] [2021-11-13 18:47:34,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:34,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:34,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:34,474 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:34,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-13 18:47:34,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-11-13 18:47:34,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:34,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 18:47:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:34,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:34,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005081243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:34,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:34,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 42 [2021-11-13 18:47:34,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155831752] [2021-11-13 18:47:34,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:34,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-13 18:47:34,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-13 18:47:34,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:47:34,897 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 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 18:47:35,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:35,336 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2021-11-13 18:47:35,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-13 18:47:35,337 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 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 79 [2021-11-13 18:47:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:35,337 INFO L225 Difference]: With dead ends: 142 [2021-11-13 18:47:35,338 INFO L226 Difference]: Without dead ends: 81 [2021-11-13 18:47:35,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=902, Invalid=2880, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 18:47:35,339 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:35,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 128 Invalid, 242 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 119.29ms Time] [2021-11-13 18:47:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-13 18:47:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-13 18:47:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:47:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-11-13 18:47:35,349 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2021-11-13 18:47:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:35,349 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-11-13 18:47:35,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 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 18:47:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-11-13 18:47:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-13 18:47:35,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:35,350 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:35,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-13 18:47:35,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:35,551 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:35,551 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2021-11-13 18:47:35,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:35,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20177192] [2021-11-13 18:47:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:35,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:35,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:35,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20177192] [2021-11-13 18:47:35,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20177192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:35,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748310604] [2021-11-13 18:47:35,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:35,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:35,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:35,846 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:35,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-13 18:47:35,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-13 18:47:35,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:35,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 18:47:35,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:36,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:36,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748310604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:36,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:36,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2021-11-13 18:47:36,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744559910] [2021-11-13 18:47:36,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:36,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 18:47:36,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:36,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 18:47:36,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:47:36,342 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 18:47:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:36,724 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-11-13 18:47:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-13 18:47:36,724 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 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 80 [2021-11-13 18:47:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:36,725 INFO L225 Difference]: With dead ends: 92 [2021-11-13 18:47:36,725 INFO L226 Difference]: Without dead ends: 90 [2021-11-13 18:47:36,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:47:36,727 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:36,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 35 Invalid, 263 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [62 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 142.35ms Time] [2021-11-13 18:47:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-13 18:47:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-11-13 18:47:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:47:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-13 18:47:36,740 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2021-11-13 18:47:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:36,740 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-13 18:47:36,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 18:47:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-13 18:47:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 18:47:36,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:36,741 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:36,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:36,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-13 18:47:36,965 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2021-11-13 18:47:36,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:36,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531061521] [2021-11-13 18:47:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:36,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:37,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:37,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531061521] [2021-11-13 18:47:37,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531061521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:37,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51306447] [2021-11-13 18:47:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:37,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:37,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:37,585 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:37,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-13 18:47:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:37,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-13 18:47:37,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:38,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51306447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:38,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:38,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2021-11-13 18:47:38,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934253446] [2021-11-13 18:47:38,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:38,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-13 18:47:38,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-13 18:47:38,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:47:38,027 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:47:38,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:38,511 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-11-13 18:47:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 18:47:38,512 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 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 83 [2021-11-13 18:47:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:38,512 INFO L225 Difference]: With dead ends: 149 [2021-11-13 18:47:38,513 INFO L226 Difference]: Without dead ends: 85 [2021-11-13 18:47:38,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=989, Invalid=3171, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:47:38,514 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:38,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 171 Invalid, 318 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [4 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 149.14ms Time] [2021-11-13 18:47:38,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-13 18:47:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-13 18:47:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 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 18:47:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-11-13 18:47:38,526 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2021-11-13 18:47:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:38,526 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-11-13 18:47:38,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 18:47:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-11-13 18:47:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-13 18:47:38,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:38,527 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:38,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:38,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-13 18:47:38,733 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:38,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:38,733 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2021-11-13 18:47:38,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:38,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837024161] [2021-11-13 18:47:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:38,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:39,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:39,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837024161] [2021-11-13 18:47:39,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837024161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:39,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408327518] [2021-11-13 18:47:39,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:39,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:39,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:39,034 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:39,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-13 18:47:39,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:39,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-13 18:47:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:39,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:39,483 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:39,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408327518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:39,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:39,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2021-11-13 18:47:39,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804345260] [2021-11-13 18:47:39,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:39,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:47:39,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:47:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:47:39,486 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 18:47:39,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:39,826 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2021-11-13 18:47:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-13 18:47:39,827 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 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 84 [2021-11-13 18:47:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:39,828 INFO L225 Difference]: With dead ends: 96 [2021-11-13 18:47:39,828 INFO L226 Difference]: Without dead ends: 94 [2021-11-13 18:47:39,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 18:47:39,829 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:39,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 37 Invalid, 298 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [104 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 148.76ms Time] [2021-11-13 18:47:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-13 18:47:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-11-13 18:47:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:47:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-11-13 18:47:39,837 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2021-11-13 18:47:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:39,838 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-11-13 18:47:39,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 18:47:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-11-13 18:47:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-13 18:47:39,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:39,838 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:39,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-13 18:47:40,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-13 18:47:40,039 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2021-11-13 18:47:40,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:40,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513192387] [2021-11-13 18:47:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:40,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:40,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:40,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513192387] [2021-11-13 18:47:40,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513192387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:40,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26893730] [2021-11-13 18:47:40,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:40,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:40,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:40,721 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:40,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-13 18:47:40,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-11-13 18:47:40,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 18:47:40,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:41,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:41,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26893730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:41,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:41,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 46 [2021-11-13 18:47:41,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735032898] [2021-11-13 18:47:41,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:41,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:47:41,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:47:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:47:41,212 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:47:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:41,744 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-11-13 18:47:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-13 18:47:41,745 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 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 87 [2021-11-13 18:47:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:41,745 INFO L225 Difference]: With dead ends: 156 [2021-11-13 18:47:41,745 INFO L226 Difference]: Without dead ends: 89 [2021-11-13 18:47:41,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-11-13 18:47:41,746 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:41,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 155 Invalid, 304 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 138.02ms Time] [2021-11-13 18:47:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-13 18:47:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-13 18:47:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 18:47:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2021-11-13 18:47:41,759 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2021-11-13 18:47:41,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:41,759 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2021-11-13 18:47:41,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:47:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2021-11-13 18:47:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 18:47:41,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:41,761 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:41,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:41,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-13 18:47:41,973 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:41,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2021-11-13 18:47:41,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:41,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797857859] [2021-11-13 18:47:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:41,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:42,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:42,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797857859] [2021-11-13 18:47:42,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797857859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:42,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645086104] [2021-11-13 18:47:42,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:42,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:42,301 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:42,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-13 18:47:42,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:42,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:47:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:42,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:42,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645086104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:42,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:42,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2021-11-13 18:47:42,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062734348] [2021-11-13 18:47:42,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:42,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:47:42,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:47:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:47:42,947 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:47:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:43,321 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-11-13 18:47:43,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-13 18:47:43,321 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 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 88 [2021-11-13 18:47:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:43,322 INFO L225 Difference]: With dead ends: 100 [2021-11-13 18:47:43,322 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 18:47:43,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:47:43,323 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 76 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:43,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 36 Invalid, 296 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [89 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 149.35ms Time] [2021-11-13 18:47:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 18:47:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2021-11-13 18:47:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:47:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2021-11-13 18:47:43,336 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2021-11-13 18:47:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:43,337 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2021-11-13 18:47:43,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:47:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2021-11-13 18:47:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-13 18:47:43,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:43,338 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:43,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-13 18:47:43,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:43,541 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:43,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2021-11-13 18:47:43,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:43,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548056684] [2021-11-13 18:47:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:43,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:44,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:44,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548056684] [2021-11-13 18:47:44,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548056684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:44,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985988488] [2021-11-13 18:47:44,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:44,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:44,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:44,270 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:44,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-13 18:47:44,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-13 18:47:44,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 18:47:44,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:44,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:44,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985988488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:44,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:44,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 48 [2021-11-13 18:47:44,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149912047] [2021-11-13 18:47:44,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:44,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-13 18:47:44,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:44,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-13 18:47:44,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 18:47:44,847 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:47:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:45,365 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2021-11-13 18:47:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-13 18:47:45,365 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 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 91 [2021-11-13 18:47:45,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:45,366 INFO L225 Difference]: With dead ends: 163 [2021-11-13 18:47:45,366 INFO L226 Difference]: Without dead ends: 93 [2021-11-13 18:47:45,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1175, Invalid=3795, Unknown=0, NotChecked=0, Total=4970 [2021-11-13 18:47:45,367 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:45,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 427 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [7 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 147.73ms Time] [2021-11-13 18:47:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-13 18:47:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-13 18:47:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 18:47:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-11-13 18:47:45,377 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2021-11-13 18:47:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:45,377 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-11-13 18:47:45,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 18:47:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-11-13 18:47:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:47:45,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:45,379 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:45,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-13 18:47:45,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-13 18:47:45,605 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:45,605 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2021-11-13 18:47:45,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:45,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041355202] [2021-11-13 18:47:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:45,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:45,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:45,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041355202] [2021-11-13 18:47:45,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041355202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:45,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234942384] [2021-11-13 18:47:45,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:45,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:45,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:45,957 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:45,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-13 18:47:46,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-11-13 18:47:46,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-13 18:47:46,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:46,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:46,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234942384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:46,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:46,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2021-11-13 18:47:46,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408985177] [2021-11-13 18:47:46,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:46,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-13 18:47:46,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-13 18:47:46,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:47:46,526 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 18:47:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:46,861 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2021-11-13 18:47:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-13 18:47:46,861 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 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 92 [2021-11-13 18:47:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:46,862 INFO L225 Difference]: With dead ends: 104 [2021-11-13 18:47:46,862 INFO L226 Difference]: Without dead ends: 102 [2021-11-13 18:47:46,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:47:46,863 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.65ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:46,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 319 Unknown, 0 Unchecked, 0.65ms Time], IncrementalHoareTripleChecker [93 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 119.48ms Time] [2021-11-13 18:47:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-13 18:47:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-11-13 18:47:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:47:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-11-13 18:47:46,875 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2021-11-13 18:47:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:46,875 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-11-13 18:47:46,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 18:47:46,876 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-11-13 18:47:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 18:47:46,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:46,877 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:46,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-13 18:47:47,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-13 18:47:47,085 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2021-11-13 18:47:47,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:47,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993472736] [2021-11-13 18:47:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:47,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:47,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:47,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993472736] [2021-11-13 18:47:47,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993472736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:47,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206849423] [2021-11-13 18:47:47,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:47,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:47,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:47,750 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:47,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-13 18:47:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:47,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-13 18:47:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:48,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:48,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206849423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:48,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:48,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 50 [2021-11-13 18:47:48,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618324743] [2021-11-13 18:47:48,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:48,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 18:47:48,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 18:47:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:47:48,206 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:47:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:48,753 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-11-13 18:47:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-13 18:47:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 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 95 [2021-11-13 18:47:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:48,754 INFO L225 Difference]: With dead ends: 170 [2021-11-13 18:47:48,754 INFO L226 Difference]: Without dead ends: 97 [2021-11-13 18:47:48,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2021-11-13 18:47:48,756 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:48,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 205 Invalid, 386 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [5 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 136.59ms Time] [2021-11-13 18:47:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-13 18:47:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-13 18:47:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 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 18:47:48,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-11-13 18:47:48,768 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2021-11-13 18:47:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:48,768 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-11-13 18:47:48,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:47:48,769 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-11-13 18:47:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 18:47:48,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:48,770 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:48,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-11-13 18:47:48,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:48,989 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:48,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2021-11-13 18:47:48,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:48,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120211269] [2021-11-13 18:47:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:48,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:49,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:49,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120211269] [2021-11-13 18:47:49,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120211269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:49,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648400057] [2021-11-13 18:47:49,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:47:49,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:49,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:49,369 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:49,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-13 18:47:49,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:47:49,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 18:47:49,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:49,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:49,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648400057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:49,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:49,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2021-11-13 18:47:49,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856296163] [2021-11-13 18:47:49,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:49,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 18:47:49,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 18:47:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:47:49,940 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:47:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:50,313 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2021-11-13 18:47:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-13 18:47:50,313 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 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 96 [2021-11-13 18:47:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:50,314 INFO L225 Difference]: With dead ends: 108 [2021-11-13 18:47:50,314 INFO L226 Difference]: Without dead ends: 106 [2021-11-13 18:47:50,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2021-11-13 18:47:50,315 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 85 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:50,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 33 Invalid, 334 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [96 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 143.79ms Time] [2021-11-13 18:47:50,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-13 18:47:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-11-13 18:47:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 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 18:47:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-11-13 18:47:50,325 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2021-11-13 18:47:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:50,325 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-11-13 18:47:50,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:47:50,325 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-11-13 18:47:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 18:47:50,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:50,326 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:50,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:50,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:50,527 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:50,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2021-11-13 18:47:50,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:50,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439959917] [2021-11-13 18:47:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:50,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:51,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:51,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439959917] [2021-11-13 18:47:51,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439959917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:51,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139617162] [2021-11-13 18:47:51,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:47:51,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:51,266 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:51,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-13 18:47:51,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-13 18:47:51,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 18:47:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:51,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:51,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139617162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:51,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:51,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 52 [2021-11-13 18:47:51,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564106368] [2021-11-13 18:47:51,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:51,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-13 18:47:51,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:51,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-13 18:47:51,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:47:51,804 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 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 18:47:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:52,424 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2021-11-13 18:47:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-13 18:47:52,424 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 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 99 [2021-11-13 18:47:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:52,425 INFO L225 Difference]: With dead ends: 177 [2021-11-13 18:47:52,425 INFO L226 Difference]: Without dead ends: 101 [2021-11-13 18:47:52,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1377, Invalid=4475, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 18:47:52,426 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:52,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 227 Invalid, 425 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [6 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 160.99ms Time] [2021-11-13 18:47:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-13 18:47:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-13 18:47:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 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 18:47:52,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-13 18:47:52,441 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2021-11-13 18:47:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:52,441 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-13 18:47:52,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 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 18:47:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-13 18:47:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:47:52,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:52,442 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:52,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:52,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-13 18:47:52,653 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2021-11-13 18:47:52,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:52,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780609385] [2021-11-13 18:47:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:52,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:53,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:53,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780609385] [2021-11-13 18:47:53,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780609385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:53,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163438132] [2021-11-13 18:47:53,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:47:53,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:53,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:53,041 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:53,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-13 18:47:53,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:47:53,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-13 18:47:53,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:53,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:53,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163438132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:53,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:53,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2021-11-13 18:47:53,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433301521] [2021-11-13 18:47:53,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:53,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-13 18:47:53,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:53,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-13 18:47:53,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:47:53,695 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:47:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:54,125 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-11-13 18:47:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-13 18:47:54,126 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 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 100 [2021-11-13 18:47:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:54,127 INFO L225 Difference]: With dead ends: 112 [2021-11-13 18:47:54,127 INFO L226 Difference]: Without dead ends: 110 [2021-11-13 18:47:54,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 18:47:54,129 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 93 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:54,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 27 Invalid, 318 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [101 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 154.28ms Time] [2021-11-13 18:47:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-13 18:47:54,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-11-13 18:47:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 18:47:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2021-11-13 18:47:54,142 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2021-11-13 18:47:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:54,143 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2021-11-13 18:47:54,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 18:47:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2021-11-13 18:47:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 18:47:54,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:54,144 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:54,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-13 18:47:54,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-13 18:47:54,358 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2021-11-13 18:47:54,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:54,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381989662] [2021-11-13 18:47:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:54,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:55,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:55,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381989662] [2021-11-13 18:47:55,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381989662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:55,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048112617] [2021-11-13 18:47:55,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:47:55,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:55,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:55,140 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:55,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-13 18:47:55,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-11-13 18:47:55,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:55,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 18:47:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:55,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:55,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048112617] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:55,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:55,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 54 [2021-11-13 18:47:55,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874993672] [2021-11-13 18:47:55,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:55,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-13 18:47:55,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-13 18:47:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2021-11-13 18:47:55,693 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 18:47:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:56,339 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2021-11-13 18:47:56,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-13 18:47:56,339 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 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 103 [2021-11-13 18:47:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:56,340 INFO L225 Difference]: With dead ends: 184 [2021-11-13 18:47:56,340 INFO L226 Difference]: Without dead ends: 105 [2021-11-13 18:47:56,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1484, Invalid=4836, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:47:56,342 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:56,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 175 Invalid, 335 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [7 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 134.82ms Time] [2021-11-13 18:47:56,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-13 18:47:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-13 18:47:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 18:47:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-11-13 18:47:56,353 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2021-11-13 18:47:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:56,354 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-11-13 18:47:56,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 18:47:56,354 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-11-13 18:47:56,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:47:56,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:56,354 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:56,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-11-13 18:47:56,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-13 18:47:56,555 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:56,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:56,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2021-11-13 18:47:56,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:56,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607889483] [2021-11-13 18:47:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:56,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:56,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:56,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607889483] [2021-11-13 18:47:56,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607889483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:56,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256438711] [2021-11-13 18:47:56,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:47:56,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:56,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:56,932 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:56,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-13 18:47:57,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-13 18:47:57,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:47:57,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-13 18:47:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:57,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:57,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256438711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:57,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:57,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2021-11-13 18:47:57,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412812367] [2021-11-13 18:47:57,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:57,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:47:57,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:47:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2021-11-13 18:47:57,507 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 18:47:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:57,883 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2021-11-13 18:47:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-13 18:47:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 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 104 [2021-11-13 18:47:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:57,885 INFO L225 Difference]: With dead ends: 116 [2021-11-13 18:47:57,885 INFO L226 Difference]: Without dead ends: 114 [2021-11-13 18:47:57,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 18:47:57,886 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:57,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 35 Invalid, 359 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [80 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 134.87ms Time] [2021-11-13 18:47:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-13 18:47:57,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2021-11-13 18:47:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:47:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-11-13 18:47:57,904 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2021-11-13 18:47:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:57,904 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-11-13 18:47:57,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 18:47:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-11-13 18:47:57,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 18:47:57,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:57,906 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:57,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:58,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-13 18:47:58,121 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2021-11-13 18:47:58,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:58,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683642891] [2021-11-13 18:47:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:58,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:58,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:58,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683642891] [2021-11-13 18:47:58,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683642891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:58,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987356789] [2021-11-13 18:47:58,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:47:58,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:58,967 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:58,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-13 18:47:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:59,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-13 18:47:59,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:59,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:47:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:59,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987356789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:47:59,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:47:59,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 56 [2021-11-13 18:47:59,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575578342] [2021-11-13 18:47:59,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:47:59,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-13 18:47:59,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-13 18:47:59,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 18:47:59,527 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:48:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:00,278 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-11-13 18:48:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-13 18:48:00,278 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 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 107 [2021-11-13 18:48:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:00,279 INFO L225 Difference]: With dead ends: 191 [2021-11-13 18:48:00,279 INFO L226 Difference]: Without dead ends: 109 [2021-11-13 18:48:00,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1595, Invalid=5211, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 18:48:00,280 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.29ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:00,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 238 Invalid, 453 Unknown, 0 Unchecked, 1.29ms Time], IncrementalHoareTripleChecker [6 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 179.89ms Time] [2021-11-13 18:48:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-13 18:48:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-11-13 18:48:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 18:48:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-11-13 18:48:00,298 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2021-11-13 18:48:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:00,298 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-11-13 18:48:00,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:48:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-11-13 18:48:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 18:48:00,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:00,299 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:00,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:00,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:00,513 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:00,513 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2021-11-13 18:48:00,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:00,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121825035] [2021-11-13 18:48:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:00,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:00,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:00,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121825035] [2021-11-13 18:48:00,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121825035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:00,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890427841] [2021-11-13 18:48:00,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:48:00,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:00,966 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:00,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-13 18:48:01,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:48:01,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:01,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-13 18:48:01,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:01,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:01,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890427841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:01,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:01,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2021-11-13 18:48:01,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769939173] [2021-11-13 18:48:01,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:01,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:48:01,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:48:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:48:01,584 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:48:01,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:01,995 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2021-11-13 18:48:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-13 18:48:01,996 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 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 108 [2021-11-13 18:48:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:01,996 INFO L225 Difference]: With dead ends: 120 [2021-11-13 18:48:01,996 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:48:01,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:48:01,997 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:01,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 29 Invalid, 362 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [109 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 147.26ms Time] [2021-11-13 18:48:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:48:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2021-11-13 18:48:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 18:48:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-11-13 18:48:02,014 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2021-11-13 18:48:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:02,014 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-11-13 18:48:02,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:48:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-11-13 18:48:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:48:02,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:02,015 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:02,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:02,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:02,229 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:02,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2021-11-13 18:48:02,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:02,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949957064] [2021-11-13 18:48:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:02,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:03,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:03,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949957064] [2021-11-13 18:48:03,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949957064] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:03,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819723483] [2021-11-13 18:48:03,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:48:03,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:03,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:03,218 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:03,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-13 18:48:03,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-11-13 18:48:03,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-13 18:48:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:03,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:03,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819723483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:03,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:03,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 58 [2021-11-13 18:48:03,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87435037] [2021-11-13 18:48:03,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:03,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-13 18:48:03,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-13 18:48:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 18:48:03,957 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 18:48:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:04,667 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2021-11-13 18:48:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-13 18:48:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 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 111 [2021-11-13 18:48:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:04,668 INFO L225 Difference]: With dead ends: 198 [2021-11-13 18:48:04,668 INFO L226 Difference]: Without dead ends: 113 [2021-11-13 18:48:04,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1710, Invalid=5600, Unknown=0, NotChecked=0, Total=7310 [2021-11-13 18:48:04,669 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.69ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:04,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 208 Invalid, 405 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [9 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 154.69ms Time] [2021-11-13 18:48:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-13 18:48:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-13 18:48:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:48:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2021-11-13 18:48:04,687 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2021-11-13 18:48:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:04,687 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2021-11-13 18:48:04,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 18:48:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2021-11-13 18:48:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:48:04,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:04,689 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:04,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-13 18:48:04,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-13 18:48:04,905 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:04,905 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2021-11-13 18:48:04,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:04,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034598989] [2021-11-13 18:48:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:04,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:05,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:05,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034598989] [2021-11-13 18:48:05,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034598989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:05,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635349898] [2021-11-13 18:48:05,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:48:05,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:05,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:05,337 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:05,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-13 18:48:05,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:48:05,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:05,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-13 18:48:05,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:05,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:05,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635349898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:05,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:05,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2021-11-13 18:48:05,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639357243] [2021-11-13 18:48:05,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:05,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 18:48:05,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 18:48:05,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:48:05,888 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:06,328 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2021-11-13 18:48:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-13 18:48:06,328 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-13 18:48:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:06,329 INFO L225 Difference]: With dead ends: 124 [2021-11-13 18:48:06,329 INFO L226 Difference]: Without dead ends: 122 [2021-11-13 18:48:06,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 18:48:06,330 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:06,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 27 Invalid, 402 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [139 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 166.22ms Time] [2021-11-13 18:48:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-13 18:48:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2021-11-13 18:48:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:48:06,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2021-11-13 18:48:06,347 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2021-11-13 18:48:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:06,347 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2021-11-13 18:48:06,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:06,348 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2021-11-13 18:48:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 18:48:06,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:06,349 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:06,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:06,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:06,553 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2021-11-13 18:48:06,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:06,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565448168] [2021-11-13 18:48:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:06,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:07,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:07,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565448168] [2021-11-13 18:48:07,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565448168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:07,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754184493] [2021-11-13 18:48:07,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:48:07,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:07,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:07,585 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:07,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-13 18:48:07,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-11-13 18:48:07,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:07,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-13 18:48:07,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:07,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:08,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754184493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:08,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:08,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 60 [2021-11-13 18:48:08,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917738834] [2021-11-13 18:48:08,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:08,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-13 18:48:08,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-13 18:48:08,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:48:08,132 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:48:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:08,876 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2021-11-13 18:48:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-13 18:48:08,877 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-11-13 18:48:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:08,882 INFO L225 Difference]: With dead ends: 205 [2021-11-13 18:48:08,882 INFO L226 Difference]: Without dead ends: 117 [2021-11-13 18:48:08,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1829, Invalid=6003, Unknown=0, NotChecked=0, Total=7832 [2021-11-13 18:48:08,883 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:08,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 234 Invalid, 462 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [6 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 173.90ms Time] [2021-11-13 18:48:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-13 18:48:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-13 18:48:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 18:48:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-11-13 18:48:08,903 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2021-11-13 18:48:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:08,903 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-11-13 18:48:08,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:48:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-11-13 18:48:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:48:08,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:08,904 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:08,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:09,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:09,133 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2021-11-13 18:48:09,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:09,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335555114] [2021-11-13 18:48:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:09,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:09,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:09,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335555114] [2021-11-13 18:48:09,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335555114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:09,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013686770] [2021-11-13 18:48:09,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:48:09,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:09,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:09,551 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:09,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-13 18:48:09,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-11-13 18:48:09,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:09,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-13 18:48:09,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:09,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013686770] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:10,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:10,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2021-11-13 18:48:10,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315179890] [2021-11-13 18:48:10,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:10,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 18:48:10,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:10,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 18:48:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:48:10,172 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 18:48:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:10,610 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-11-13 18:48:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-13 18:48:10,611 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-13 18:48:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:10,613 INFO L225 Difference]: With dead ends: 128 [2021-11-13 18:48:10,613 INFO L226 Difference]: Without dead ends: 126 [2021-11-13 18:48:10,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:48:10,614 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:10,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 26 Invalid, 389 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [117 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 153.75ms Time] [2021-11-13 18:48:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-13 18:48:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2021-11-13 18:48:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 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 18:48:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-11-13 18:48:10,628 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2021-11-13 18:48:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:10,628 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-11-13 18:48:10,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 18:48:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-11-13 18:48:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 18:48:10,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:10,629 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:10,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:10,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-13 18:48:10,830 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2021-11-13 18:48:10,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:10,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677987265] [2021-11-13 18:48:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:10,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:11,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:11,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677987265] [2021-11-13 18:48:11,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677987265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:11,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236914100] [2021-11-13 18:48:11,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:48:11,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:11,891 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:11,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-13 18:48:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-13 18:48:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:12,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:12,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236914100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:12,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:12,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 62 [2021-11-13 18:48:12,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819602222] [2021-11-13 18:48:12,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:12,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-13 18:48:12,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-13 18:48:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 18:48:12,445 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 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 18:48:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:13,290 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-11-13 18:48:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-13 18:48:13,290 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 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 119 [2021-11-13 18:48:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:13,291 INFO L225 Difference]: With dead ends: 212 [2021-11-13 18:48:13,291 INFO L226 Difference]: Without dead ends: 121 [2021-11-13 18:48:13,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1952, Invalid=6420, Unknown=0, NotChecked=0, Total=8372 [2021-11-13 18:48:13,293 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.26ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 209.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:13,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 258 Invalid, 507 Unknown, 0 Unchecked, 1.26ms Time], IncrementalHoareTripleChecker [9 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 209.75ms Time] [2021-11-13 18:48:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-13 18:48:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-13 18:48:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:48:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-11-13 18:48:13,313 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2021-11-13 18:48:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:13,313 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-11-13 18:48:13,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 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 18:48:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-11-13 18:48:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 18:48:13,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:13,315 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:13,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:13,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-13 18:48:13,529 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2021-11-13 18:48:13,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:13,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730350506] [2021-11-13 18:48:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:13,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:13,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:13,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730350506] [2021-11-13 18:48:13,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730350506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:13,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289966618] [2021-11-13 18:48:13,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:48:13,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:13,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:13,998 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:14,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-13 18:48:14,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:48:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:14,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-13 18:48:14,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:14,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:14,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289966618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:14,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:14,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2021-11-13 18:48:14,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274698362] [2021-11-13 18:48:14,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:14,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-13 18:48:14,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-13 18:48:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:48:14,549 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:48:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:15,087 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2021-11-13 18:48:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-13 18:48:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-11-13 18:48:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:15,089 INFO L225 Difference]: With dead ends: 132 [2021-11-13 18:48:15,089 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:48:15,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2021-11-13 18:48:15,090 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 101 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:15,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 30 Invalid, 442 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [120 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 195.10ms Time] [2021-11-13 18:48:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:48:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-11-13 18:48:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 18:48:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-11-13 18:48:15,111 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2021-11-13 18:48:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:15,111 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-11-13 18:48:15,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:48:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-11-13 18:48:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:48:15,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:15,112 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:15,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:15,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:15,336 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2021-11-13 18:48:15,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:15,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198308140] [2021-11-13 18:48:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:15,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:16,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:16,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198308140] [2021-11-13 18:48:16,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198308140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:16,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446155198] [2021-11-13 18:48:16,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:48:16,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:16,413 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:16,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-13 18:48:16,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-11-13 18:48:16,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-13 18:48:16,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:16,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:17,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446155198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:17,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:17,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 64 [2021-11-13 18:48:17,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199799119] [2021-11-13 18:48:17,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:17,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-13 18:48:17,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-13 18:48:17,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:48:17,021 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 18:48:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:17,865 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-11-13 18:48:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-13 18:48:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 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 123 [2021-11-13 18:48:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:17,866 INFO L225 Difference]: With dead ends: 219 [2021-11-13 18:48:17,866 INFO L226 Difference]: Without dead ends: 125 [2021-11-13 18:48:17,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2079, Invalid=6851, Unknown=0, NotChecked=0, Total=8930 [2021-11-13 18:48:17,867 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:17,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 291 Invalid, 576 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [7 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 198.71ms Time] [2021-11-13 18:48:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-13 18:48:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-13 18:48:17,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 18:48:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-11-13 18:48:17,888 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2021-11-13 18:48:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:17,888 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-11-13 18:48:17,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 18:48:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-11-13 18:48:17,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 18:48:17,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:17,889 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:17,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-13 18:48:18,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:18,090 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2021-11-13 18:48:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:18,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114279120] [2021-11-13 18:48:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:18,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:18,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:18,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114279120] [2021-11-13 18:48:18,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114279120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:18,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527264514] [2021-11-13 18:48:18,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:48:18,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:18,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:18,627 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:18,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-13 18:48:18,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:48:18,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-13 18:48:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:18,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:19,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527264514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:19,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:19,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2021-11-13 18:48:19,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439084558] [2021-11-13 18:48:19,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:19,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:48:19,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:48:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:48:19,246 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 18:48:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:19,769 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2021-11-13 18:48:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-13 18:48:19,770 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 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 124 [2021-11-13 18:48:19,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:19,770 INFO L225 Difference]: With dead ends: 136 [2021-11-13 18:48:19,770 INFO L226 Difference]: Without dead ends: 134 [2021-11-13 18:48:19,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2021-11-13 18:48:19,771 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 138 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 186.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:19,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 28 Invalid, 456 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [154 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 186.57ms Time] [2021-11-13 18:48:19,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-13 18:48:19,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-11-13 18:48:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:48:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2021-11-13 18:48:19,786 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2021-11-13 18:48:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:19,786 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2021-11-13 18:48:19,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 18:48:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2021-11-13 18:48:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-13 18:48:19,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:19,787 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:19,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:19,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-13 18:48:19,988 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2021-11-13 18:48:19,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:19,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575199429] [2021-11-13 18:48:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:19,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:21,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:21,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575199429] [2021-11-13 18:48:21,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575199429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:21,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858147778] [2021-11-13 18:48:21,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:48:21,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:21,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:21,127 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:21,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-13 18:48:21,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-13 18:48:21,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-13 18:48:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:21,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:21,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858147778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:21,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:21,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 66 [2021-11-13 18:48:21,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238297939] [2021-11-13 18:48:21,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:21,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-13 18:48:21,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-13 18:48:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2021-11-13 18:48:21,742 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:48:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:22,634 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2021-11-13 18:48:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-13 18:48:22,635 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 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 18:48:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:22,636 INFO L225 Difference]: With dead ends: 226 [2021-11-13 18:48:22,636 INFO L226 Difference]: Without dead ends: 129 [2021-11-13 18:48:22,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2210, Invalid=7296, Unknown=0, NotChecked=0, Total=9506 [2021-11-13 18:48:22,638 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.42ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 194.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:22,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 292 Invalid, 562 Unknown, 0 Unchecked, 1.42ms Time], IncrementalHoareTripleChecker [7 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 194.33ms Time] [2021-11-13 18:48:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-13 18:48:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-13 18:48:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 18:48:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2021-11-13 18:48:22,660 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2021-11-13 18:48:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:22,661 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2021-11-13 18:48:22,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:48:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2021-11-13 18:48:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:48:22,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:22,662 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:22,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-13 18:48:22,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:22,873 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:22,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:22,873 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2021-11-13 18:48:22,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:22,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662863000] [2021-11-13 18:48:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:22,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:23,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:23,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662863000] [2021-11-13 18:48:23,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662863000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:23,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134762059] [2021-11-13 18:48:23,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:48:23,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:23,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:23,496 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:23,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-13 18:48:23,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-13 18:48:23,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:23,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-13 18:48:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:23,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:24,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134762059] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:24,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:24,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2021-11-13 18:48:24,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821790369] [2021-11-13 18:48:24,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:24,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 18:48:24,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:24,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 18:48:24,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:48:24,201 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 18:48:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:24,693 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2021-11-13 18:48:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-13 18:48:24,694 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 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 128 [2021-11-13 18:48:24,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:24,694 INFO L225 Difference]: With dead ends: 140 [2021-11-13 18:48:24,694 INFO L226 Difference]: Without dead ends: 138 [2021-11-13 18:48:24,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2021-11-13 18:48:24,695 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:24,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 23 Invalid, 402 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [129 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 157.70ms Time] [2021-11-13 18:48:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-13 18:48:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-11-13 18:48:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 18:48:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2021-11-13 18:48:24,712 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2021-11-13 18:48:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:24,712 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2021-11-13 18:48:24,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 18:48:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2021-11-13 18:48:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 18:48:24,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:24,714 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:24,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-13 18:48:24,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:24,918 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2021-11-13 18:48:24,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:24,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755408615] [2021-11-13 18:48:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:24,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:26,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:26,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755408615] [2021-11-13 18:48:26,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755408615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:26,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15644988] [2021-11-13 18:48:26,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:48:26,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:26,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:26,060 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:26,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-13 18:48:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-13 18:48:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:26,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:26,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15644988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:26,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:26,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 68 [2021-11-13 18:48:26,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503244087] [2021-11-13 18:48:26,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:26,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-13 18:48:26,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-13 18:48:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2021-11-13 18:48:26,622 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 18:48:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:27,515 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2021-11-13 18:48:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-13 18:48:27,516 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 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 131 [2021-11-13 18:48:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:27,517 INFO L225 Difference]: With dead ends: 233 [2021-11-13 18:48:27,517 INFO L226 Difference]: Without dead ends: 133 [2021-11-13 18:48:27,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2345, Invalid=7755, Unknown=0, NotChecked=0, Total=10100 [2021-11-13 18:48:27,518 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 178.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:27,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 524 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [6 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 178.81ms Time] [2021-11-13 18:48:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-13 18:48:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-13 18:48:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-11-13 18:48:27,533 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2021-11-13 18:48:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:27,533 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-11-13 18:48:27,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 18:48:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-11-13 18:48:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 18:48:27,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:27,534 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:27,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-13 18:48:27,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-13 18:48:27,737 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2021-11-13 18:48:27,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:27,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205346895] [2021-11-13 18:48:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:27,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:28,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:28,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205346895] [2021-11-13 18:48:28,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205346895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:28,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509795970] [2021-11-13 18:48:28,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:48:28,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:28,236 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:28,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-13 18:48:28,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:48:28,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-13 18:48:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:28,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:28,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509795970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:28,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:28,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2021-11-13 18:48:28,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194506375] [2021-11-13 18:48:28,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:28,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 18:48:28,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:28,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 18:48:28,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-11-13 18:48:28,899 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 18:48:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:29,509 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2021-11-13 18:48:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-13 18:48:29,509 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 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 132 [2021-11-13 18:48:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:29,511 INFO L225 Difference]: With dead ends: 144 [2021-11-13 18:48:29,511 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 18:48:29,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 291 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2021-11-13 18:48:29,519 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 111 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:29,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 32 Invalid, 435 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [133 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 195.58ms Time] [2021-11-13 18:48:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 18:48:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2021-11-13 18:48:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:48:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2021-11-13 18:48:29,545 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2021-11-13 18:48:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:29,545 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2021-11-13 18:48:29,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 18:48:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2021-11-13 18:48:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 18:48:29,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:29,546 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:29,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:29,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:29,761 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:29,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:29,761 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2021-11-13 18:48:29,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:29,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974576257] [2021-11-13 18:48:29,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:29,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:30,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:30,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974576257] [2021-11-13 18:48:30,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974576257] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:30,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446579461] [2021-11-13 18:48:30,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:48:30,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:30,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:30,971 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:30,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-13 18:48:31,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-11-13 18:48:31,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-13 18:48:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:31,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:31,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446579461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:31,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:31,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 70 [2021-11-13 18:48:31,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450701512] [2021-11-13 18:48:31,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:31,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-13 18:48:31,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-13 18:48:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2021-11-13 18:48:31,612 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:48:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:32,573 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2021-11-13 18:48:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-13 18:48:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-11-13 18:48:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:32,574 INFO L225 Difference]: With dead ends: 240 [2021-11-13 18:48:32,574 INFO L226 Difference]: Without dead ends: 137 [2021-11-13 18:48:32,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2484, Invalid=8228, Unknown=0, NotChecked=0, Total=10712 [2021-11-13 18:48:32,575 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:32,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 253 Invalid, 511 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [6 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 198.44ms Time] [2021-11-13 18:48:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-13 18:48:32,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-13 18:48:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 18:48:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2021-11-13 18:48:32,599 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2021-11-13 18:48:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:32,600 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2021-11-13 18:48:32,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 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 18:48:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2021-11-13 18:48:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 18:48:32,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:32,600 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:32,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-13 18:48:32,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-13 18:48:32,801 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:32,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2021-11-13 18:48:32,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:32,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360497940] [2021-11-13 18:48:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:32,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:33,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:33,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360497940] [2021-11-13 18:48:33,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360497940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:33,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560223523] [2021-11-13 18:48:33,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:48:33,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:33,337 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:33,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-13 18:48:33,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:48:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-13 18:48:33,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:33,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:33,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560223523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:33,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:33,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2021-11-13 18:48:33,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217863867] [2021-11-13 18:48:33,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:33,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:48:33,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:33,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:48:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:48:33,970 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:34,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:34,523 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2021-11-13 18:48:34,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-13 18:48:34,524 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-13 18:48:34,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:34,524 INFO L225 Difference]: With dead ends: 148 [2021-11-13 18:48:34,524 INFO L226 Difference]: Without dead ends: 146 [2021-11-13 18:48:34,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 300 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2021-11-13 18:48:34,525 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 152.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 186.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:34,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 33 Invalid, 497 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [137 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 186.06ms Time] [2021-11-13 18:48:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-13 18:48:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-11-13 18:48:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 18:48:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2021-11-13 18:48:34,542 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2021-11-13 18:48:34,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:34,542 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2021-11-13 18:48:34,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2021-11-13 18:48:34,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-13 18:48:34,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:34,543 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:34,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:34,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-13 18:48:34,745 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:34,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2021-11-13 18:48:34,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:34,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326795024] [2021-11-13 18:48:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:34,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:36,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:36,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326795024] [2021-11-13 18:48:36,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326795024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:36,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113918098] [2021-11-13 18:48:36,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:48:36,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:36,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:36,044 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:36,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-13 18:48:36,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-11-13 18:48:36,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:36,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-13 18:48:36,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:36,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:36,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113918098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:36,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:36,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 72 [2021-11-13 18:48:36,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570932161] [2021-11-13 18:48:36,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:36,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-13 18:48:36,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:36,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-13 18:48:36,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2021-11-13 18:48:36,682 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 18:48:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:37,639 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2021-11-13 18:48:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-13 18:48:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 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 139 [2021-11-13 18:48:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:37,640 INFO L225 Difference]: With dead ends: 247 [2021-11-13 18:48:37,640 INFO L226 Difference]: Without dead ends: 141 [2021-11-13 18:48:37,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2627, Invalid=8715, Unknown=0, NotChecked=0, Total=11342 [2021-11-13 18:48:37,642 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 141.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:37,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 227 Invalid, 454 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [9 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 168.47ms Time] [2021-11-13 18:48:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-13 18:48:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-11-13 18:48:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 18:48:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-11-13 18:48:37,667 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2021-11-13 18:48:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:37,668 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-11-13 18:48:37,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 18:48:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-11-13 18:48:37,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 18:48:37,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:37,668 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:37,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:37,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:37,869 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:37,869 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2021-11-13 18:48:37,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:37,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096904515] [2021-11-13 18:48:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:37,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:38,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:38,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096904515] [2021-11-13 18:48:38,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096904515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:38,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992974501] [2021-11-13 18:48:38,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:48:38,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:38,434 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:38,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-13 18:48:38,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-11-13 18:48:38,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-13 18:48:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:38,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:39,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992974501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:39,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:39,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2021-11-13 18:48:39,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31333086] [2021-11-13 18:48:39,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:39,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-13 18:48:39,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:39,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-13 18:48:39,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:48:39,131 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 18:48:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:39,697 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2021-11-13 18:48:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-13 18:48:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 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 140 [2021-11-13 18:48:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:39,698 INFO L225 Difference]: With dead ends: 152 [2021-11-13 18:48:39,698 INFO L226 Difference]: Without dead ends: 150 [2021-11-13 18:48:39,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2021-11-13 18:48:39,699 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:39,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 36 Invalid, 481 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [140 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 183.30ms Time] [2021-11-13 18:48:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-13 18:48:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2021-11-13 18:48:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 18:48:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2021-11-13 18:48:39,723 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2021-11-13 18:48:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:39,723 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2021-11-13 18:48:39,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 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 18:48:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2021-11-13 18:48:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 18:48:39,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:39,724 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:39,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-13 18:48:39,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:39,953 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2021-11-13 18:48:39,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:39,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380042818] [2021-11-13 18:48:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:39,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:41,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:41,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380042818] [2021-11-13 18:48:41,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380042818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:41,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517861558] [2021-11-13 18:48:41,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:48:41,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:41,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:41,286 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:41,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-13 18:48:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:41,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-13 18:48:41,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:41,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:41,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517861558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:41,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:41,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 74 [2021-11-13 18:48:41,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531290918] [2021-11-13 18:48:41,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:41,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-13 18:48:41,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-13 18:48:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2021-11-13 18:48:41,908 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 18:48:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:42,938 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2021-11-13 18:48:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-13 18:48:42,939 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 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 143 [2021-11-13 18:48:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:42,939 INFO L225 Difference]: With dead ends: 254 [2021-11-13 18:48:42,940 INFO L226 Difference]: Without dead ends: 145 [2021-11-13 18:48:42,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2774, Invalid=9216, Unknown=0, NotChecked=0, Total=11990 [2021-11-13 18:48:42,941 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:42,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 283 Invalid, 570 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [8 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 195.10ms Time] [2021-11-13 18:48:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-13 18:48:42,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-13 18:48:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 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 18:48:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-11-13 18:48:42,980 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2021-11-13 18:48:42,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:42,980 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-11-13 18:48:42,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 18:48:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-11-13 18:48:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:48:42,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:42,982 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:43,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:43,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-13 18:48:43,197 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:43,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2021-11-13 18:48:43,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:43,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278032896] [2021-11-13 18:48:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:43,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:43,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:43,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278032896] [2021-11-13 18:48:43,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278032896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:43,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155654745] [2021-11-13 18:48:43,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:48:43,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:43,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:43,764 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:43,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-13 18:48:43,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:48:43,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:43,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-13 18:48:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:44,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:44,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155654745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:44,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:44,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2021-11-13 18:48:44,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079425478] [2021-11-13 18:48:44,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:44,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:48:44,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:44,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:48:44,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:48:44,451 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 18:48:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:45,039 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2021-11-13 18:48:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-13 18:48:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 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 144 [2021-11-13 18:48:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:45,041 INFO L225 Difference]: With dead ends: 156 [2021-11-13 18:48:45,041 INFO L226 Difference]: Without dead ends: 154 [2021-11-13 18:48:45,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 318 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2021-11-13 18:48:45,041 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 121 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 188.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:45,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 37 Invalid, 505 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [144 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 188.34ms Time] [2021-11-13 18:48:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-13 18:48:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-11-13 18:48:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2021-11-13 18:48:45,072 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2021-11-13 18:48:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:45,073 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2021-11-13 18:48:45,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 18:48:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2021-11-13 18:48:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 18:48:45,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:45,074 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:45,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-13 18:48:45,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:45,281 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:45,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2021-11-13 18:48:45,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:45,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136324476] [2021-11-13 18:48:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:45,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:46,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:46,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136324476] [2021-11-13 18:48:46,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136324476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:46,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160413536] [2021-11-13 18:48:46,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:48:46,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:46,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:46,683 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:46,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-13 18:48:46,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-11-13 18:48:46,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-13 18:48:46,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:47,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160413536] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:47,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:47,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 76 [2021-11-13 18:48:47,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899029945] [2021-11-13 18:48:47,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:47,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-13 18:48:47,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:47,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-13 18:48:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2021-11-13 18:48:47,471 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:48,619 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2021-11-13 18:48:48,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-13 18:48:48,619 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-13 18:48:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:48,620 INFO L225 Difference]: With dead ends: 261 [2021-11-13 18:48:48,620 INFO L226 Difference]: Without dead ends: 149 [2021-11-13 18:48:48,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2925, Invalid=9731, Unknown=0, NotChecked=0, Total=12656 [2021-11-13 18:48:48,622 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.65ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 257.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:48,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 408 Invalid, 797 Unknown, 0 Unchecked, 1.65ms Time], IncrementalHoareTripleChecker [5 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 257.98ms Time] [2021-11-13 18:48:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-13 18:48:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-11-13 18:48:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 18:48:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-11-13 18:48:48,651 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2021-11-13 18:48:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:48,652 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-11-13 18:48:48,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-11-13 18:48:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-13 18:48:48,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:48,653 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:48,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:48,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:48,869 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:48,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2021-11-13 18:48:48,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:48,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370015014] [2021-11-13 18:48:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:48,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:49,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:49,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370015014] [2021-11-13 18:48:49,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370015014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:49,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408186781] [2021-11-13 18:48:49,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:48:49,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:49,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:49,483 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:49,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-13 18:48:49,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:48:49,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:49,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-13 18:48:49,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:49,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:50,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408186781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:50,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:50,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2021-11-13 18:48:50,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56720074] [2021-11-13 18:48:50,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:50,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-13 18:48:50,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:50,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-13 18:48:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:48:50,252 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 18:48:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:50,863 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2021-11-13 18:48:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-13 18:48:50,864 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 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 148 [2021-11-13 18:48:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:50,865 INFO L225 Difference]: With dead ends: 160 [2021-11-13 18:48:50,865 INFO L226 Difference]: Without dead ends: 158 [2021-11-13 18:48:50,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:48:50,866 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 164 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.19ms SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:50,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 31 Invalid, 510 Unknown, 0 Unchecked, 1.19ms Time], IncrementalHoareTripleChecker [184 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 191.26ms Time] [2021-11-13 18:48:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-13 18:48:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2021-11-13 18:48:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 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 18:48:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2021-11-13 18:48:50,892 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2021-11-13 18:48:50,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:50,892 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2021-11-13 18:48:50,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 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 18:48:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2021-11-13 18:48:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 18:48:50,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:50,893 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:50,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-11-13 18:48:51,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-11-13 18:48:51,094 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:51,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:51,094 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2021-11-13 18:48:51,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:51,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316766972] [2021-11-13 18:48:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:51,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:52,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:52,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316766972] [2021-11-13 18:48:52,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316766972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:52,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909334475] [2021-11-13 18:48:52,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:48:52,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:52,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:52,612 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:52,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-13 18:48:52,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-11-13 18:48:52,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:52,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-13 18:48:52,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:53,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:53,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909334475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:53,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:53,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 78 [2021-11-13 18:48:53,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093747455] [2021-11-13 18:48:53,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:53,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-13 18:48:53,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:53,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-13 18:48:53,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2021-11-13 18:48:53,353 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 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 18:48:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:54,534 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2021-11-13 18:48:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-13 18:48:54,534 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 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 151 [2021-11-13 18:48:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:54,535 INFO L225 Difference]: With dead ends: 268 [2021-11-13 18:48:54,535 INFO L226 Difference]: Without dead ends: 153 [2021-11-13 18:48:54,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3080, Invalid=10260, Unknown=0, NotChecked=0, Total=13340 [2021-11-13 18:48:54,536 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:54,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 299 Invalid, 595 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [7 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 228.47ms Time] [2021-11-13 18:48:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-13 18:48:54,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-13 18:48:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2021-11-13 18:48:54,558 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2021-11-13 18:48:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:54,558 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2021-11-13 18:48:54,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 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 18:48:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2021-11-13 18:48:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 18:48:54,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:54,559 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:54,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:54,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:54,760 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2021-11-13 18:48:54,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:54,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387919344] [2021-11-13 18:48:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:54,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:55,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:55,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387919344] [2021-11-13 18:48:55,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387919344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:55,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268027192] [2021-11-13 18:48:55,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:48:55,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:55,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:55,386 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:55,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-13 18:48:55,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-13 18:48:55,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-13 18:48:55,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:55,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:56,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268027192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:56,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:56,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2021-11-13 18:48:56,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066546696] [2021-11-13 18:48:56,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:56,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-13 18:48:56,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:56,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-13 18:48:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:48:56,098 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:48:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:56,768 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2021-11-13 18:48:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-13 18:48:56,768 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 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 152 [2021-11-13 18:48:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:56,772 INFO L225 Difference]: With dead ends: 164 [2021-11-13 18:48:56,773 INFO L226 Difference]: Without dead ends: 162 [2021-11-13 18:48:56,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 18:48:56,774 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 160 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:56,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 29 Invalid, 538 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [189 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 201.41ms Time] [2021-11-13 18:48:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-13 18:48:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2021-11-13 18:48:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:56,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2021-11-13 18:48:56,795 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2021-11-13 18:48:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:56,795 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2021-11-13 18:48:56,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 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 18:48:56,796 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2021-11-13 18:48:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-13 18:48:56,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:56,796 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:56,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:56,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:56,997 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2021-11-13 18:48:56,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:56,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278873239] [2021-11-13 18:48:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:56,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:58,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:58,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278873239] [2021-11-13 18:48:58,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278873239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:58,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668018371] [2021-11-13 18:48:58,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:48:58,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:58,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:58,583 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:58,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-13 18:48:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:58,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-13 18:48:58,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:58,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:59,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668018371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:48:59,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:48:59,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 80 [2021-11-13 18:48:59,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212083669] [2021-11-13 18:48:59,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:59,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 18:48:59,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 18:48:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:48:59,222 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:00,377 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2021-11-13 18:49:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-13 18:49:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-13 18:49:00,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:00,378 INFO L225 Difference]: With dead ends: 275 [2021-11-13 18:49:00,378 INFO L226 Difference]: Without dead ends: 157 [2021-11-13 18:49:00,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3239, Invalid=10803, Unknown=0, NotChecked=0, Total=14042 [2021-11-13 18:49:00,379 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:00,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 278 Invalid, 554 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [6 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 198.48ms Time] [2021-11-13 18:49:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-13 18:49:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-11-13 18:49:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 18:49:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-11-13 18:49:00,409 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2021-11-13 18:49:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:00,409 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-11-13 18:49:00,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-11-13 18:49:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:49:00,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:00,410 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:00,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-13 18:49:00,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-13 18:49:00,610 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2021-11-13 18:49:00,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:00,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64077790] [2021-11-13 18:49:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:00,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:01,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:01,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64077790] [2021-11-13 18:49:01,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64077790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:01,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059941710] [2021-11-13 18:49:01,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:49:01,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:01,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:01,272 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:01,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-13 18:49:01,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:49:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-13 18:49:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:01,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059941710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:01,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:01,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 44 [2021-11-13 18:49:01,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895521114] [2021-11-13 18:49:01,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:01,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-13 18:49:01,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-13 18:49:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2021-11-13 18:49:01,949 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 18:49:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:02,613 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2021-11-13 18:49:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-13 18:49:02,614 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 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 156 [2021-11-13 18:49:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:02,615 INFO L225 Difference]: With dead ends: 168 [2021-11-13 18:49:02,615 INFO L226 Difference]: Without dead ends: 166 [2021-11-13 18:49:02,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 345 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2021-11-13 18:49:02,615 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 129 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:02,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 36 Invalid, 572 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [157 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 210.40ms Time] [2021-11-13 18:49:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-13 18:49:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-11-13 18:49:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 18:49:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2021-11-13 18:49:02,637 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2021-11-13 18:49:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:02,637 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2021-11-13 18:49:02,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 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 18:49:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2021-11-13 18:49:02,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-13 18:49:02,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:02,638 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:02,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-11-13 18:49:02,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:02,845 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:02,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2021-11-13 18:49:02,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:02,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849382264] [2021-11-13 18:49:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:02,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:04,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:04,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849382264] [2021-11-13 18:49:04,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849382264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:04,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971420946] [2021-11-13 18:49:04,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:49:04,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:04,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:04,447 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:04,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-13 18:49:04,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-11-13 18:49:04,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:04,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-13 18:49:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:04,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:05,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971420946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:05,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:05,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 82 [2021-11-13 18:49:05,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366881569] [2021-11-13 18:49:05,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:05,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-13 18:49:05,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-13 18:49:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 18:49:05,201 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 18:49:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:06,463 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2021-11-13 18:49:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-13 18:49:06,463 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 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 159 [2021-11-13 18:49:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:06,464 INFO L225 Difference]: With dead ends: 282 [2021-11-13 18:49:06,464 INFO L226 Difference]: Without dead ends: 161 [2021-11-13 18:49:06,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2413 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3402, Invalid=11360, Unknown=0, NotChecked=0, Total=14762 [2021-11-13 18:49:06,465 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 239.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:06,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 284 Invalid, 571 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [9 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 239.06ms Time] [2021-11-13 18:49:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-13 18:49:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-13 18:49:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 18:49:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2021-11-13 18:49:06,498 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2021-11-13 18:49:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:06,498 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2021-11-13 18:49:06,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 18:49:06,499 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2021-11-13 18:49:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 18:49:06,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:06,500 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:06,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:06,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:06,725 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1376953836, now seen corresponding path program 76 times [2021-11-13 18:49:06,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:06,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438851884] [2021-11-13 18:49:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:06,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:07,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:07,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438851884] [2021-11-13 18:49:07,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438851884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:07,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063557254] [2021-11-13 18:49:07,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:49:07,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:07,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:07,448 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:07,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-13 18:49:07,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:49:07,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:07,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-13 18:49:07,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:07,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:08,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063557254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:08,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:08,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 45 [2021-11-13 18:49:08,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453317454] [2021-11-13 18:49:08,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:08,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-13 18:49:08,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-13 18:49:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 18:49:08,217 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 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 18:49:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:08,908 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2021-11-13 18:49:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-13 18:49:08,908 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 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 160 [2021-11-13 18:49:08,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:08,909 INFO L225 Difference]: With dead ends: 172 [2021-11-13 18:49:08,909 INFO L226 Difference]: Without dead ends: 170 [2021-11-13 18:49:08,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2673, Invalid=4637, Unknown=0, NotChecked=0, Total=7310 [2021-11-13 18:49:08,910 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 170 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:08,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 38 Invalid, 566 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [199 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 215.47ms Time] [2021-11-13 18:49:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-13 18:49:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2021-11-13 18:49:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 18:49:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2021-11-13 18:49:08,941 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2021-11-13 18:49:08,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:08,941 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2021-11-13 18:49:08,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 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 18:49:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2021-11-13 18:49:08,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 18:49:08,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:08,942 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:08,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:09,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-13 18:49:09,157 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash -396095539, now seen corresponding path program 77 times [2021-11-13 18:49:09,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:09,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263690807] [2021-11-13 18:49:09,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:09,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:10,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:10,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263690807] [2021-11-13 18:49:10,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263690807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:10,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370791034] [2021-11-13 18:49:10,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:49:10,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:10,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:10,841 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:10,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-13 18:49:10,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-11-13 18:49:10,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-13 18:49:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:11,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:11,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370791034] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:11,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:11,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 84 [2021-11-13 18:49:11,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089116828] [2021-11-13 18:49:11,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:11,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-13 18:49:11,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:11,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-13 18:49:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2021-11-13 18:49:11,630 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 18:49:12,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:12,867 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2021-11-13 18:49:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-13 18:49:12,867 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 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 163 [2021-11-13 18:49:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:12,868 INFO L225 Difference]: With dead ends: 289 [2021-11-13 18:49:12,868 INFO L226 Difference]: Without dead ends: 165 [2021-11-13 18:49:12,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3569, Invalid=11931, Unknown=0, NotChecked=0, Total=15500 [2021-11-13 18:49:12,869 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 189.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:12,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 268 Invalid, 540 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [5 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 189.55ms Time] [2021-11-13 18:49:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-13 18:49:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-13 18:49:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 18:49:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-11-13 18:49:12,890 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2021-11-13 18:49:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:12,890 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-11-13 18:49:12,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 18:49:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-11-13 18:49:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 18:49:12,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:12,891 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:12,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-13 18:49:13,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-13 18:49:13,092 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:13,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1725603960, now seen corresponding path program 78 times [2021-11-13 18:49:13,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:13,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669912107] [2021-11-13 18:49:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:13,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:13,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:13,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669912107] [2021-11-13 18:49:13,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669912107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:13,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580625544] [2021-11-13 18:49:13,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:49:13,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:13,806 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:13,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-13 18:49:13,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-11-13 18:49:13,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:13,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-13 18:49:13,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:14,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:14,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580625544] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:14,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:14,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2021-11-13 18:49:14,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236780490] [2021-11-13 18:49:14,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:14,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:49:14,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:14,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:49:14,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:49:14,576 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 18:49:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:15,292 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2021-11-13 18:49:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-13 18:49:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 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 18:49:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:15,294 INFO L225 Difference]: With dead ends: 176 [2021-11-13 18:49:15,294 INFO L226 Difference]: Without dead ends: 174 [2021-11-13 18:49:15,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2801, Invalid=4855, Unknown=0, NotChecked=0, Total=7656 [2021-11-13 18:49:15,294 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 130 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:15,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 35 Invalid, 610 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [164 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 221.80ms Time] [2021-11-13 18:49:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-13 18:49:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2021-11-13 18:49:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2021-11-13 18:49:15,316 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2021-11-13 18:49:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:15,316 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2021-11-13 18:49:15,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 18:49:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2021-11-13 18:49:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-13 18:49:15,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:15,317 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:15,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-11-13 18:49:15,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-13 18:49:15,518 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:15,518 INFO L85 PathProgramCache]: Analyzing trace with hash -999186255, now seen corresponding path program 79 times [2021-11-13 18:49:15,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:15,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972941258] [2021-11-13 18:49:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:15,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:17,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:17,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972941258] [2021-11-13 18:49:17,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972941258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:17,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937203241] [2021-11-13 18:49:17,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:49:17,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:17,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:17,277 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:17,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-13 18:49:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-13 18:49:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:17,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:17,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937203241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:17,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:17,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 86 [2021-11-13 18:49:17,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832922987] [2021-11-13 18:49:17,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:17,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-13 18:49:17,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:17,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-13 18:49:17,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2021-11-13 18:49:17,971 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:19,280 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2021-11-13 18:49:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-13 18:49:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-13 18:49:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:19,281 INFO L225 Difference]: With dead ends: 296 [2021-11-13 18:49:19,281 INFO L226 Difference]: Without dead ends: 169 [2021-11-13 18:49:19,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3740, Invalid=12516, Unknown=0, NotChecked=0, Total=16256 [2021-11-13 18:49:19,283 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:19,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 269 Invalid, 541 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [6 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 210.40ms Time] [2021-11-13 18:49:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-13 18:49:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-13 18:49:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2021-11-13 18:49:19,317 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2021-11-13 18:49:19,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:19,317 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2021-11-13 18:49:19,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2021-11-13 18:49:19,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-13 18:49:19,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:19,318 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:19,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:19,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:19,520 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1874945300, now seen corresponding path program 80 times [2021-11-13 18:49:19,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:19,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823096870] [2021-11-13 18:49:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:19,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:20,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:20,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823096870] [2021-11-13 18:49:20,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823096870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:20,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937217159] [2021-11-13 18:49:20,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:49:20,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:20,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:20,268 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:20,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-13 18:49:20,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:49:20,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-13 18:49:20,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:20,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:21,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937217159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:21,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:21,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 47 [2021-11-13 18:49:21,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854363846] [2021-11-13 18:49:21,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:21,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 18:49:21,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:21,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 18:49:21,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:49:21,130 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:21,890 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2021-11-13 18:49:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-13 18:49:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-13 18:49:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:21,891 INFO L225 Difference]: With dead ends: 180 [2021-11-13 18:49:21,891 INFO L226 Difference]: Without dead ends: 178 [2021-11-13 18:49:21,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2932, Invalid=5078, Unknown=0, NotChecked=0, Total=8010 [2021-11-13 18:49:21,892 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 192.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.02ms SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:21,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 35 Invalid, 572 Unknown, 0 Unchecked, 1.02ms Time], IncrementalHoareTripleChecker [169 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 252.68ms Time] [2021-11-13 18:49:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-13 18:49:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2021-11-13 18:49:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 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 18:49:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2021-11-13 18:49:21,929 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2021-11-13 18:49:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:21,930 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2021-11-13 18:49:21,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2021-11-13 18:49:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-13 18:49:21,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:21,931 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:21,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:22,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:22,145 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:22,145 INFO L85 PathProgramCache]: Analyzing trace with hash -440927539, now seen corresponding path program 81 times [2021-11-13 18:49:22,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:22,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25213290] [2021-11-13 18:49:22,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:22,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:23,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:23,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25213290] [2021-11-13 18:49:23,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25213290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:23,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851351550] [2021-11-13 18:49:23,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:49:23,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:23,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:23,975 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:23,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-13 18:49:24,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-11-13 18:49:24,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:24,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-13 18:49:24,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:24,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:24,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851351550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:24,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:24,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 88 [2021-11-13 18:49:24,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207397243] [2021-11-13 18:49:24,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:24,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-13 18:49:24,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-13 18:49:24,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2021-11-13 18:49:24,767 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 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 18:49:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:26,154 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2021-11-13 18:49:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-13 18:49:26,155 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 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 171 [2021-11-13 18:49:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:26,156 INFO L225 Difference]: With dead ends: 303 [2021-11-13 18:49:26,156 INFO L226 Difference]: Without dead ends: 173 [2021-11-13 18:49:26,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3915, Invalid=13115, Unknown=0, NotChecked=0, Total=17030 [2021-11-13 18:49:26,158 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:26,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 336 Invalid, 673 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [5 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 228.43ms Time] [2021-11-13 18:49:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-13 18:49:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-13 18:49:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 18:49:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-11-13 18:49:26,197 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2021-11-13 18:49:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:26,198 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-11-13 18:49:26,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 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 18:49:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-11-13 18:49:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-13 18:49:26,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:26,199 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:26,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:26,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:26,413 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:26,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1313382520, now seen corresponding path program 82 times [2021-11-13 18:49:26,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:26,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808453184] [2021-11-13 18:49:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:26,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:27,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:27,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808453184] [2021-11-13 18:49:27,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808453184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:27,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414110088] [2021-11-13 18:49:27,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:49:27,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:27,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:27,389 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:27,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-13 18:49:27,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:49:27,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-13 18:49:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:27,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:28,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414110088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:28,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:28,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 48 [2021-11-13 18:49:28,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257640084] [2021-11-13 18:49:28,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:28,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-13 18:49:28,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-13 18:49:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 18:49:28,204 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:28,961 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2021-11-13 18:49:28,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-13 18:49:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-11-13 18:49:28,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:28,962 INFO L225 Difference]: With dead ends: 184 [2021-11-13 18:49:28,962 INFO L226 Difference]: Without dead ends: 182 [2021-11-13 18:49:28,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 381 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3066, Invalid=5306, Unknown=0, NotChecked=0, Total=8372 [2021-11-13 18:49:28,963 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.20ms SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:28,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 32 Invalid, 593 Unknown, 0 Unchecked, 1.20ms Time], IncrementalHoareTripleChecker [214 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 226.74ms Time] [2021-11-13 18:49:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-13 18:49:29,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2021-11-13 18:49:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2021-11-13 18:49:29,002 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2021-11-13 18:49:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:29,002 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2021-11-13 18:49:29,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2021-11-13 18:49:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-13 18:49:29,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:29,004 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:29,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-11-13 18:49:29,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:29,229 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash 178233521, now seen corresponding path program 83 times [2021-11-13 18:49:29,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:29,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035136437] [2021-11-13 18:49:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:29,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:31,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:31,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035136437] [2021-11-13 18:49:31,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035136437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:31,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097688264] [2021-11-13 18:49:31,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:49:31,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:31,162 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:31,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-13 18:49:31,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-11-13 18:49:31,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:31,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-13 18:49:31,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:31,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:31,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097688264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:31,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:31,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 90 [2021-11-13 18:49:31,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970107435] [2021-11-13 18:49:31,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:31,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-13 18:49:31,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-13 18:49:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2021-11-13 18:49:31,950 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:33,433 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2021-11-13 18:49:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-13 18:49:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-13 18:49:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:33,434 INFO L225 Difference]: With dead ends: 310 [2021-11-13 18:49:33,434 INFO L226 Difference]: Without dead ends: 177 [2021-11-13 18:49:33,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4094, Invalid=13728, Unknown=0, NotChecked=0, Total=17822 [2021-11-13 18:49:33,436 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 270.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:33,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 404 Invalid, 811 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [7 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 270.02ms Time] [2021-11-13 18:49:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-13 18:49:33,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-11-13 18:49:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2021-11-13 18:49:33,460 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2021-11-13 18:49:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:33,460 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2021-11-13 18:49:33,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:33,460 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2021-11-13 18:49:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 18:49:33,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:33,462 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:33,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:33,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-11-13 18:49:33,662 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1251487724, now seen corresponding path program 84 times [2021-11-13 18:49:33,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:33,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600825936] [2021-11-13 18:49:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:33,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:34,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:34,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600825936] [2021-11-13 18:49:34,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600825936] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:34,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661204432] [2021-11-13 18:49:34,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:49:34,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:34,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:34,469 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:34,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-13 18:49:34,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-11-13 18:49:34,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-13 18:49:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:34,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:35,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661204432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:35,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:35,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 49 [2021-11-13 18:49:35,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553048080] [2021-11-13 18:49:35,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:35,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 18:49:35,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 18:49:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2021-11-13 18:49:35,300 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 18:49:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:36,113 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2021-11-13 18:49:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-13 18:49:36,113 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 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 176 [2021-11-13 18:49:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:36,114 INFO L225 Difference]: With dead ends: 188 [2021-11-13 18:49:36,114 INFO L226 Difference]: Without dead ends: 186 [2021-11-13 18:49:36,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 390 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3203, Invalid=5539, Unknown=0, NotChecked=0, Total=8742 [2021-11-13 18:49:36,115 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 211.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 254.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:36,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 38 Invalid, 668 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [177 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 254.44ms Time] [2021-11-13 18:49:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-13 18:49:36,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2021-11-13 18:49:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 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 18:49:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2021-11-13 18:49:36,147 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2021-11-13 18:49:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:36,147 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2021-11-13 18:49:36,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 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 18:49:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2021-11-13 18:49:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-13 18:49:36,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:36,149 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:36,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:36,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:36,349 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:36,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1535490611, now seen corresponding path program 85 times [2021-11-13 18:49:36,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:36,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394574122] [2021-11-13 18:49:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:36,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:38,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:38,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394574122] [2021-11-13 18:49:38,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394574122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:38,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602583263] [2021-11-13 18:49:38,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:49:38,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:38,370 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:38,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-13 18:49:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-13 18:49:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:38,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:39,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602583263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:39,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:39,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 92 [2021-11-13 18:49:39,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166283083] [2021-11-13 18:49:39,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:39,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-13 18:49:39,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-13 18:49:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2021-11-13 18:49:39,116 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 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 18:49:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:40,760 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2021-11-13 18:49:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-13 18:49:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 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 179 [2021-11-13 18:49:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:40,761 INFO L225 Difference]: With dead ends: 317 [2021-11-13 18:49:40,761 INFO L226 Difference]: Without dead ends: 181 [2021-11-13 18:49:40,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4277, Invalid=14355, Unknown=0, NotChecked=0, Total=18632 [2021-11-13 18:49:40,763 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 347.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:40,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 499 Invalid, 1000 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [7 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 347.87ms Time] [2021-11-13 18:49:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-13 18:49:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-13 18:49:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-11-13 18:49:40,805 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2021-11-13 18:49:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:40,805 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-11-13 18:49:40,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 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 18:49:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-11-13 18:49:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-13 18:49:40,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:40,807 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:40,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:41,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:41,017 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:41,017 INFO L85 PathProgramCache]: Analyzing trace with hash 181583752, now seen corresponding path program 86 times [2021-11-13 18:49:41,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:41,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761080111] [2021-11-13 18:49:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:41,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 946 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:41,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:41,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761080111] [2021-11-13 18:49:41,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761080111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:41,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794470365] [2021-11-13 18:49:41,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:49:41,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:41,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:41,866 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:41,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-13 18:49:41,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:49:41,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:41,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-13 18:49:41,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:42,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:42,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:42,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794470365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:42,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:42,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 50 [2021-11-13 18:49:42,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367139172] [2021-11-13 18:49:42,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:42,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 18:49:42,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:42,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 18:49:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:49:42,638 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 18:49:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:43,458 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2021-11-13 18:49:43,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-13 18:49:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 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 180 [2021-11-13 18:49:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:43,459 INFO L225 Difference]: With dead ends: 192 [2021-11-13 18:49:43,459 INFO L226 Difference]: Without dead ends: 190 [2021-11-13 18:49:43,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 399 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3343, Invalid=5777, Unknown=0, NotChecked=0, Total=9120 [2021-11-13 18:49:43,469 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 150 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 193.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 233.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:43,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 34 Invalid, 633 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [180 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 233.68ms Time] [2021-11-13 18:49:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-13 18:49:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2021-11-13 18:49:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2021-11-13 18:49:43,512 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 180 [2021-11-13 18:49:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:43,512 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2021-11-13 18:49:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 18:49:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2021-11-13 18:49:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-13 18:49:43,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:43,513 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:43,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-11-13 18:49:43,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-13 18:49:43,725 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2092416847, now seen corresponding path program 87 times [2021-11-13 18:49:43,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:43,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988206567] [2021-11-13 18:49:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:43,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:45,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:45,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988206567] [2021-11-13 18:49:45,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988206567] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:45,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995309788] [2021-11-13 18:49:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:49:45,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:45,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:45,861 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:45,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-13 18:49:46,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-11-13 18:49:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:46,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-13 18:49:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:46,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:46,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995309788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:46,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:46,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 94 [2021-11-13 18:49:46,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464383442] [2021-11-13 18:49:46,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:46,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-13 18:49:46,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-13 18:49:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2021-11-13 18:49:46,742 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:48,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:48,326 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2021-11-13 18:49:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-13 18:49:48,326 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-13 18:49:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:48,327 INFO L225 Difference]: With dead ends: 324 [2021-11-13 18:49:48,327 INFO L226 Difference]: Without dead ends: 185 [2021-11-13 18:49:48,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3190 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4464, Invalid=14996, Unknown=0, NotChecked=0, Total=19460 [2021-11-13 18:49:48,329 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 270.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:48,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 410 Invalid, 816 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [7 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 270.07ms Time] [2021-11-13 18:49:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-11-13 18:49:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-11-13 18:49:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 18:49:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2021-11-13 18:49:48,372 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 183 [2021-11-13 18:49:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:48,372 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2021-11-13 18:49:48,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2021-11-13 18:49:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-13 18:49:48,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:48,374 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:48,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-11-13 18:49:48,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:48,593 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:48,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:48,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1324915476, now seen corresponding path program 88 times [2021-11-13 18:49:48,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:48,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744489838] [2021-11-13 18:49:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:48,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 990 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:49,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:49,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744489838] [2021-11-13 18:49:49,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744489838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:49,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130945089] [2021-11-13 18:49:49,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:49:49,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:49,458 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:49,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-13 18:49:49,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:49:49,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-13 18:49:49,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:49,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:50,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130945089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:50,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:50,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 51 [2021-11-13 18:49:50,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559028436] [2021-11-13 18:49:50,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:50,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-13 18:49:50,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-13 18:49:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 18:49:50,252 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:51,083 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2021-11-13 18:49:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-13 18:49:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-13 18:49:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:51,085 INFO L225 Difference]: With dead ends: 196 [2021-11-13 18:49:51,085 INFO L226 Difference]: Without dead ends: 194 [2021-11-13 18:49:51,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2383 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3486, Invalid=6020, Unknown=0, NotChecked=0, Total=9506 [2021-11-13 18:49:51,086 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 235.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:51,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 41 Invalid, 631 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [140 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 235.35ms Time] [2021-11-13 18:49:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-13 18:49:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2021-11-13 18:49:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 18:49:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2021-11-13 18:49:51,113 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 184 [2021-11-13 18:49:51,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:51,113 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2021-11-13 18:49:51,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:49:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2021-11-13 18:49:51,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-13 18:49:51,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:51,114 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:51,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:51,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-13 18:49:51,341 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 197325005, now seen corresponding path program 89 times [2021-11-13 18:49:51,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:51,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626315000] [2021-11-13 18:49:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:51,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:53,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:53,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626315000] [2021-11-13 18:49:53,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626315000] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:53,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849114729] [2021-11-13 18:49:53,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:49:53,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:53,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:53,600 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:53,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-13 18:49:53,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-11-13 18:49:53,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:53,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-13 18:49:53,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:54,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:54,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849114729] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:54,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:54,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 96 [2021-11-13 18:49:54,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93002233] [2021-11-13 18:49:54,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:54,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-13 18:49:54,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-13 18:49:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2021-11-13 18:49:54,439 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 18:49:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:56,103 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2021-11-13 18:49:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-13 18:49:56,103 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 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 187 [2021-11-13 18:49:56,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:56,104 INFO L225 Difference]: With dead ends: 331 [2021-11-13 18:49:56,104 INFO L226 Difference]: Without dead ends: 189 [2021-11-13 18:49:56,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4655, Invalid=15651, Unknown=0, NotChecked=0, Total=20306 [2021-11-13 18:49:56,106 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 295.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:56,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 451 Invalid, 905 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [8 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 295.07ms Time] [2021-11-13 18:49:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-13 18:49:56,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-11-13 18:49:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 18:49:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-11-13 18:49:56,135 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2021-11-13 18:49:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:56,135 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-11-13 18:49:56,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 18:49:56,136 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-11-13 18:49:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-13 18:49:56,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:56,137 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:56,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-13 18:49:56,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:56,353 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1083146120, now seen corresponding path program 90 times [2021-11-13 18:49:56,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:56,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197702066] [2021-11-13 18:49:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:56,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1035 proven. 3106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:57,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:57,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197702066] [2021-11-13 18:49:57,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197702066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:57,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243627217] [2021-11-13 18:49:57,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:49:57,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:57,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:57,267 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:57,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-13 18:49:57,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2021-11-13 18:49:57,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:49:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-13 18:49:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:57,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:58,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243627217] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:58,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:58,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2021-11-13 18:49:58,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446428654] [2021-11-13 18:49:58,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:58,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-13 18:49:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-13 18:49:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2021-11-13 18:49:58,157 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 18:49:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:59,070 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2021-11-13 18:49:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-13 18:49:59,071 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-13 18:49:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:59,072 INFO L225 Difference]: With dead ends: 200 [2021-11-13 18:49:59,072 INFO L226 Difference]: Without dead ends: 198 [2021-11-13 18:49:59,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 417 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3632, Invalid=6268, Unknown=0, NotChecked=0, Total=9900 [2021-11-13 18:49:59,073 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 275.69ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:59,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 33 Invalid, 629 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [189 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 275.69ms Time] [2021-11-13 18:49:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-13 18:49:59,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 192. [2021-11-13 18:49:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 18:49:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2021-11-13 18:49:59,105 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 188 [2021-11-13 18:49:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:59,105 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2021-11-13 18:49:59,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6923076923076925) internal successors, (192), 52 states have internal predecessors, (192), 0 states have call successors, (0), 0 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 18:49:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2021-11-13 18:49:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-13 18:49:59,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:59,107 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:59,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:59,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:59,333 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash -78413647, now seen corresponding path program 91 times [2021-11-13 18:49:59,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:59,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664320112] [2021-11-13 18:49:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:59,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:01,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:01,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664320112] [2021-11-13 18:50:01,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664320112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:01,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488562733] [2021-11-13 18:50:01,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:50:01,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:01,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:01,622 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:01,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-13 18:50:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-13 18:50:01,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:02,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 3197 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:02,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488562733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:02,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:02,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 98 [2021-11-13 18:50:02,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923792058] [2021-11-13 18:50:02,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:02,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-13 18:50:02,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:02,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-13 18:50:02,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2021-11-13 18:50:02,417 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 98 states, 98 states have (on average 1.969387755102041) internal successors, (193), 98 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 18:50:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:04,143 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2021-11-13 18:50:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-13 18:50:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.969387755102041) internal successors, (193), 98 states have internal predecessors, (193), 0 states have call successors, (0), 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 191 [2021-11-13 18:50:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:04,144 INFO L225 Difference]: With dead ends: 338 [2021-11-13 18:50:04,144 INFO L226 Difference]: Without dead ends: 193 [2021-11-13 18:50:04,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3473 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4850, Invalid=16320, Unknown=0, NotChecked=0, Total=21170 [2021-11-13 18:50:04,145 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 7 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 248.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 300.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:04,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 459 Invalid, 917 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [7 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 300.65ms Time] [2021-11-13 18:50:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-13 18:50:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-11-13 18:50:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 192 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 18:50:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2021-11-13 18:50:04,180 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 191 [2021-11-13 18:50:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:04,180 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2021-11-13 18:50:04,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.969387755102041) internal successors, (193), 98 states have internal predecessors, (193), 0 states have call successors, (0), 0 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 18:50:04,181 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2021-11-13 18:50:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 18:50:04,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:04,181 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:04,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:04,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:04,382 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:04,382 INFO L85 PathProgramCache]: Analyzing trace with hash -982238740, now seen corresponding path program 92 times [2021-11-13 18:50:04,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:04,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592117508] [2021-11-13 18:50:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:04,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1081 proven. 3244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:05,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:05,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592117508] [2021-11-13 18:50:05,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592117508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:05,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474953252] [2021-11-13 18:50:05,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:50:05,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:05,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:05,319 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:05,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-13 18:50:05,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:50:05,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-13 18:50:05,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:05,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 1128 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:06,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474953252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:06,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:06,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 53 [2021-11-13 18:50:06,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158050605] [2021-11-13 18:50:06,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:06,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-13 18:50:06,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-13 18:50:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:50:06,155 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 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 18:50:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:07,042 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2021-11-13 18:50:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-13 18:50:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-13 18:50:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:07,044 INFO L225 Difference]: With dead ends: 204 [2021-11-13 18:50:07,044 INFO L226 Difference]: Without dead ends: 202 [2021-11-13 18:50:07,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 426 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3781, Invalid=6521, Unknown=0, NotChecked=0, Total=10302 [2021-11-13 18:50:07,045 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 209.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:07,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 41 Invalid, 686 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [192 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 252.34ms Time] [2021-11-13 18:50:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-13 18:50:07,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-11-13 18:50:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2021-11-13 18:50:07,083 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 192 [2021-11-13 18:50:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:07,083 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2021-11-13 18:50:07,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.69811320754717) internal successors, (196), 53 states have internal predecessors, (196), 0 states have call successors, (0), 0 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 18:50:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2021-11-13 18:50:07,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:50:07,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:07,085 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:07,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-13 18:50:07,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:07,289 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash -257295411, now seen corresponding path program 93 times [2021-11-13 18:50:07,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:07,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123171288] [2021-11-13 18:50:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:07,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:09,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:09,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123171288] [2021-11-13 18:50:09,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123171288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:09,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90426608] [2021-11-13 18:50:09,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:50:09,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:09,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:09,718 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:09,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-13 18:50:09,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-11-13 18:50:09,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:09,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-13 18:50:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:10,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 3337 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:10,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90426608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:10,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:10,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 100 [2021-11-13 18:50:10,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371960755] [2021-11-13 18:50:10,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:10,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-13 18:50:10,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:10,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-13 18:50:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2021-11-13 18:50:10,619 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 100 states, 100 states have (on average 1.97) internal successors, (197), 100 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:12,494 INFO L93 Difference]: Finished difference Result 345 states and 347 transitions. [2021-11-13 18:50:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-13 18:50:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.97) internal successors, (197), 100 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2021-11-13 18:50:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:12,495 INFO L225 Difference]: With dead ends: 345 [2021-11-13 18:50:12,495 INFO L226 Difference]: Without dead ends: 197 [2021-11-13 18:50:12,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3619 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5049, Invalid=17003, Unknown=0, NotChecked=0, Total=22052 [2021-11-13 18:50:12,496 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 360.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:12,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 561 Invalid, 1133 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [7 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 360.82ms Time] [2021-11-13 18:50:12,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-13 18:50:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-13 18:50:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 18:50:12,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-13 18:50:12,534 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 195 [2021-11-13 18:50:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:12,534 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-13 18:50:12,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.97) internal successors, (197), 100 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:12,535 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-13 18:50:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-13 18:50:12,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:12,535 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:12,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:12,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:12,736 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:12,736 INFO L85 PathProgramCache]: Analyzing trace with hash -586834040, now seen corresponding path program 94 times [2021-11-13 18:50:12,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:12,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822434770] [2021-11-13 18:50:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:12,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1128 proven. 3385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:13,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:13,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822434770] [2021-11-13 18:50:13,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822434770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:13,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099119854] [2021-11-13 18:50:13,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:50:13,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:13,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:13,703 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:13,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-13 18:50:13,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:50:13,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-13 18:50:13,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:14,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1176 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099119854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:14,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:14,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 54 [2021-11-13 18:50:14,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800653411] [2021-11-13 18:50:14,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:14,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-13 18:50:14,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:14,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-13 18:50:14,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2021-11-13 18:50:14,552 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 18:50:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:15,480 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2021-11-13 18:50:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-13 18:50:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 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 196 [2021-11-13 18:50:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:15,482 INFO L225 Difference]: With dead ends: 208 [2021-11-13 18:50:15,482 INFO L226 Difference]: Without dead ends: 206 [2021-11-13 18:50:15,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2686 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3933, Invalid=6779, Unknown=0, NotChecked=0, Total=10712 [2021-11-13 18:50:15,483 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 258.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:15,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 33 Invalid, 665 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [197 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 258.77ms Time] [2021-11-13 18:50:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-13 18:50:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-11-13 18:50:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2021-11-13 18:50:15,513 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 196 [2021-11-13 18:50:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:15,513 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2021-11-13 18:50:15,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7037037037037037) internal successors, (200), 54 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 18:50:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2021-11-13 18:50:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 18:50:15,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:15,514 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:15,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:15,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:15,715 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:15,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:15,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1851170639, now seen corresponding path program 95 times [2021-11-13 18:50:15,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:15,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760157075] [2021-11-13 18:50:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:15,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:18,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:18,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760157075] [2021-11-13 18:50:18,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760157075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:18,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552768874] [2021-11-13 18:50:18,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:50:18,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:18,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:18,209 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:18,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-13 18:50:18,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-13 18:50:18,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-13 18:50:18,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:18,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 3480 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:19,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552768874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:19,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:19,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 102 [2021-11-13 18:50:19,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239808966] [2021-11-13 18:50:19,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:19,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-13 18:50:19,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:19,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-13 18:50:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2021-11-13 18:50:19,134 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 102 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 102 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:20,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:20,945 INFO L93 Difference]: Finished difference Result 352 states and 354 transitions. [2021-11-13 18:50:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-13 18:50:20,946 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 102 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-13 18:50:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:20,946 INFO L225 Difference]: With dead ends: 352 [2021-11-13 18:50:20,946 INFO L226 Difference]: Without dead ends: 201 [2021-11-13 18:50:20,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5252, Invalid=17700, Unknown=0, NotChecked=0, Total=22952 [2021-11-13 18:50:20,948 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 219.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 264.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:20,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 383 Invalid, 777 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [10 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 264.80ms Time] [2021-11-13 18:50:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-13 18:50:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-11-13 18:50:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 0 states have call successors, (0), 0 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 18:50:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2021-11-13 18:50:20,978 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 199 [2021-11-13 18:50:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:20,978 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2021-11-13 18:50:20,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 102 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2021-11-13 18:50:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 18:50:20,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:20,979 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:20,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:21,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-11-13 18:50:21,180 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash -607736084, now seen corresponding path program 96 times [2021-11-13 18:50:21,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:21,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619659490] [2021-11-13 18:50:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:21,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1176 proven. 3529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:22,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:22,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619659490] [2021-11-13 18:50:22,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619659490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:22,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611797884] [2021-11-13 18:50:22,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:50:22,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:22,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:22,172 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:22,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-13 18:50:22,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-11-13 18:50:22,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:22,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-13 18:50:22,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:22,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4705 backedges. 1225 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:23,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611797884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:23,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:23,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 55 [2021-11-13 18:50:23,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879890835] [2021-11-13 18:50:23,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:23,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-13 18:50:23,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:23,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-13 18:50:23,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:50:23,127 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 18:50:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:24,067 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2021-11-13 18:50:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-13 18:50:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 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 200 [2021-11-13 18:50:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:24,069 INFO L225 Difference]: With dead ends: 212 [2021-11-13 18:50:24,069 INFO L226 Difference]: Without dead ends: 210 [2021-11-13 18:50:24,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4088, Invalid=7042, Unknown=0, NotChecked=0, Total=11130 [2021-11-13 18:50:24,070 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 210.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 253.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:24,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 34 Invalid, 677 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [152 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 253.83ms Time] [2021-11-13 18:50:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-13 18:50:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-11-13 18:50:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 18:50:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2021-11-13 18:50:24,102 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 200 [2021-11-13 18:50:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:24,102 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2021-11-13 18:50:24,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.709090909090909) internal successors, (204), 55 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 18:50:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2021-11-13 18:50:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-13 18:50:24,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:24,103 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:24,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:24,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:24,303 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:24,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1773705523, now seen corresponding path program 97 times [2021-11-13 18:50:24,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:24,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675907283] [2021-11-13 18:50:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:24,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:26,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:26,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675907283] [2021-11-13 18:50:26,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675907283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:26,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210218714] [2021-11-13 18:50:26,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:50:26,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:26,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:26,859 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:26,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-13 18:50:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:26,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-13 18:50:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:27,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 3626 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:27,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210218714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:27,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:27,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 104 [2021-11-13 18:50:27,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349920985] [2021-11-13 18:50:27,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:27,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-13 18:50:27,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-13 18:50:27,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2021-11-13 18:50:27,700 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 104 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 104 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 18:50:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:29,584 INFO L93 Difference]: Finished difference Result 359 states and 361 transitions. [2021-11-13 18:50:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-13 18:50:29,584 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 104 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2021-11-13 18:50:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:29,585 INFO L225 Difference]: With dead ends: 359 [2021-11-13 18:50:29,585 INFO L226 Difference]: Without dead ends: 205 [2021-11-13 18:50:29,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3920 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5459, Invalid=18411, Unknown=0, NotChecked=0, Total=23870 [2021-11-13 18:50:29,587 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 7 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 227.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 273.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:29,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 392 Invalid, 796 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [6 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 273.33ms Time] [2021-11-13 18:50:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-13 18:50:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-11-13 18:50:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-11-13 18:50:29,629 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 203 [2021-11-13 18:50:29,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:29,629 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-11-13 18:50:29,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 104 states have internal predecessors, (205), 0 states have call successors, (0), 0 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 18:50:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-11-13 18:50:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-13 18:50:29,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:29,630 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:29,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-11-13 18:50:29,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:29,831 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash -666034296, now seen corresponding path program 98 times [2021-11-13 18:50:29,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:29,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271118824] [2021-11-13 18:50:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:29,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1225 proven. 3676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:30,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:30,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271118824] [2021-11-13 18:50:30,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271118824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:30,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10496635] [2021-11-13 18:50:30,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:50:30,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:30,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:30,929 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:30,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-13 18:50:31,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:50:31,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-13 18:50:31,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:31,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4901 backedges. 1275 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:31,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10496635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:31,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:31,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 56 [2021-11-13 18:50:31,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930177838] [2021-11-13 18:50:31,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:31,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-13 18:50:31,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:31,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-13 18:50:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=1694, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 18:50:31,810 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:32,791 INFO L93 Difference]: Finished difference Result 216 states and 217 transitions. [2021-11-13 18:50:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-13 18:50:32,792 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-11-13 18:50:32,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:32,793 INFO L225 Difference]: With dead ends: 216 [2021-11-13 18:50:32,793 INFO L226 Difference]: Without dead ends: 214 [2021-11-13 18:50:32,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 453 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2898 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4246, Invalid=7310, Unknown=0, NotChecked=0, Total=11556 [2021-11-13 18:50:32,794 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 113 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 216.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 261.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:32,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 32 Invalid, 695 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [155 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 261.90ms Time] [2021-11-13 18:50:32,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-13 18:50:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2021-11-13 18:50:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2021-11-13 18:50:32,830 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 204 [2021-11-13 18:50:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:32,831 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2021-11-13 18:50:32,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.7142857142857144) internal successors, (208), 56 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2021-11-13 18:50:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 18:50:32,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:32,832 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:32,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-11-13 18:50:33,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:33,032 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash 926015665, now seen corresponding path program 99 times [2021-11-13 18:50:33,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:33,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660490878] [2021-11-13 18:50:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:33,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:35,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:35,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660490878] [2021-11-13 18:50:35,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660490878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:35,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147655201] [2021-11-13 18:50:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:50:35,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:35,698 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:35,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-13 18:50:35,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2021-11-13 18:50:35,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-13 18:50:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:36,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 3775 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:36,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147655201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:36,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:36,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105, 105] total 106 [2021-11-13 18:50:36,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533077469] [2021-11-13 18:50:36,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:36,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-13 18:50:36,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-13 18:50:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2021-11-13 18:50:36,680 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:38,698 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2021-11-13 18:50:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-13 18:50:38,698 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-11-13 18:50:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:38,699 INFO L225 Difference]: With dead ends: 366 [2021-11-13 18:50:38,699 INFO L226 Difference]: Without dead ends: 209 [2021-11-13 18:50:38,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4075 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5670, Invalid=19136, Unknown=0, NotChecked=0, Total=24806 [2021-11-13 18:50:38,700 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 327.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:38,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 497 Invalid, 999 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [8 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 327.19ms Time] [2021-11-13 18:50:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-13 18:50:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-11-13 18:50:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 18:50:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2021-11-13 18:50:38,735 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 207 [2021-11-13 18:50:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:38,735 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2021-11-13 18:50:38,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.971698113207547) internal successors, (209), 106 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:38,735 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2021-11-13 18:50:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:50:38,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:38,736 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:38,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-11-13 18:50:38,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:38,937 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash 434553836, now seen corresponding path program 100 times [2021-11-13 18:50:38,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:38,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377696962] [2021-11-13 18:50:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:38,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1275 proven. 3826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:40,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:40,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377696962] [2021-11-13 18:50:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377696962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:40,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081483240] [2021-11-13 18:50:40,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:50:40,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:40,019 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:40,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-13 18:50:40,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:50:40,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:40,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-13 18:50:40,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:40,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:40,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5101 backedges. 1326 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:40,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081483240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:40,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:40,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 57 [2021-11-13 18:50:40,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645679353] [2021-11-13 18:50:40,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:40,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-13 18:50:40,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-13 18:50:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1753, Unknown=0, NotChecked=0, Total=3192 [2021-11-13 18:50:40,915 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 18:50:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:41,919 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2021-11-13 18:50:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-13 18:50:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2021-11-13 18:50:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:41,920 INFO L225 Difference]: With dead ends: 220 [2021-11-13 18:50:41,920 INFO L226 Difference]: Without dead ends: 218 [2021-11-13 18:50:41,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 462 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4407, Invalid=7583, Unknown=0, NotChecked=0, Total=11990 [2021-11-13 18:50:41,921 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 223.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 270.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:41,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 36 Invalid, 728 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [209 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 270.04ms Time] [2021-11-13 18:50:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-13 18:50:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2021-11-13 18:50:41,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2021-11-13 18:50:41,963 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 208 [2021-11-13 18:50:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:41,963 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2021-11-13 18:50:41,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.719298245614035) internal successors, (212), 57 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 18:50:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2021-11-13 18:50:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-13 18:50:41,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:41,965 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:41,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:42,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-13 18:50:42,169 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash 766718413, now seen corresponding path program 101 times [2021-11-13 18:50:42,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:42,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632739424] [2021-11-13 18:50:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:42,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:44,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:44,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632739424] [2021-11-13 18:50:44,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632739424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:44,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076308681] [2021-11-13 18:50:44,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:50:44,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:44,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:44,939 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:44,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-13 18:50:45,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2021-11-13 18:50:45,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:45,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-13 18:50:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:45,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 3927 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:45,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076308681] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:45,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:45,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 108 [2021-11-13 18:50:45,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674403267] [2021-11-13 18:50:45,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:45,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-13 18:50:45,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-13 18:50:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2021-11-13 18:50:45,884 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 108 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 108 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:47,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:47,951 INFO L93 Difference]: Finished difference Result 373 states and 375 transitions. [2021-11-13 18:50:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-13 18:50:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 108 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-13 18:50:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:47,952 INFO L225 Difference]: With dead ends: 373 [2021-11-13 18:50:47,952 INFO L226 Difference]: Without dead ends: 213 [2021-11-13 18:50:47,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4233 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5885, Invalid=19875, Unknown=0, NotChecked=0, Total=25760 [2021-11-13 18:50:47,953 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 7 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 272.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 330.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:47,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 505 Invalid, 1015 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [7 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 330.00ms Time] [2021-11-13 18:50:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-13 18:50:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-11-13 18:50:47,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2021-11-13 18:50:47,987 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 211 [2021-11-13 18:50:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:47,987 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2021-11-13 18:50:47,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 108 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2021-11-13 18:50:47,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-13 18:50:47,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:47,988 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:48,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:48,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-13 18:50:48,193 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash 410910600, now seen corresponding path program 102 times [2021-11-13 18:50:48,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:48,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006332480] [2021-11-13 18:50:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:48,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1326 proven. 3979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:49,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:49,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006332480] [2021-11-13 18:50:49,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006332480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:49,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128718271] [2021-11-13 18:50:49,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:50:49,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:49,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:49,352 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:49,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-13 18:50:49,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2021-11-13 18:50:49,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:49,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-13 18:50:49,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:49,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5305 backedges. 1378 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:50,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128718271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:50,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:50,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 58 [2021-11-13 18:50:50,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460688704] [2021-11-13 18:50:50,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:50,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-13 18:50:50,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:50,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-13 18:50:50,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1493, Invalid=1813, Unknown=0, NotChecked=0, Total=3306 [2021-11-13 18:50:50,384 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 18:50:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:51,398 INFO L93 Difference]: Finished difference Result 224 states and 225 transitions. [2021-11-13 18:50:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-13 18:50:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 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 212 [2021-11-13 18:50:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:51,399 INFO L225 Difference]: With dead ends: 224 [2021-11-13 18:50:51,399 INFO L226 Difference]: Without dead ends: 222 [2021-11-13 18:50:51,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 471 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4571, Invalid=7861, Unknown=0, NotChecked=0, Total=12432 [2021-11-13 18:50:51,400 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 123 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 265.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:51,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 44 Invalid, 705 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [161 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 265.53ms Time] [2021-11-13 18:50:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-13 18:50:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2021-11-13 18:50:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2021-11-13 18:50:51,443 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 212 [2021-11-13 18:50:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:51,443 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2021-11-13 18:50:51,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.7241379310344827) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 18:50:51,444 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2021-11-13 18:50:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-13 18:50:51,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:51,444 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:51,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-11-13 18:50:51,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-13 18:50:51,645 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash 785711281, now seen corresponding path program 103 times [2021-11-13 18:50:51,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:51,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348302658] [2021-11-13 18:50:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:51,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:51,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:54,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:54,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348302658] [2021-11-13 18:50:54,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348302658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:54,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901314812] [2021-11-13 18:50:54,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:50:54,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:54,509 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:54,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-13 18:50:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-13 18:50:54,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:55,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 4082 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:55,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901314812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:55,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:55,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109, 109] total 110 [2021-11-13 18:50:55,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643920220] [2021-11-13 18:50:55,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:55,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-11-13 18:50:55,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:55,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-11-13 18:50:55,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2021-11-13 18:50:55,396 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 110 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:57,463 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2021-11-13 18:50:57,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-13 18:50:57,464 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 110 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-11-13 18:50:57,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:57,464 INFO L225 Difference]: With dead ends: 380 [2021-11-13 18:50:57,464 INFO L226 Difference]: Without dead ends: 217 [2021-11-13 18:50:57,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4394 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6104, Invalid=20628, Unknown=0, NotChecked=0, Total=26732 [2021-11-13 18:50:57,466 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 285.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:57,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 407 Invalid, 838 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [7 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 285.03ms Time] [2021-11-13 18:50:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-13 18:50:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-11-13 18:50:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0092592592592593) internal successors, (218), 216 states have internal predecessors, (218), 0 states have call successors, (0), 0 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 18:50:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2021-11-13 18:50:57,511 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 215 [2021-11-13 18:50:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:57,511 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2021-11-13 18:50:57,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.9727272727272727) internal successors, (217), 110 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:50:57,512 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2021-11-13 18:50:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-13 18:50:57,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:57,512 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:57,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-11-13 18:50:57,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-13 18:50:57,713 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:57,713 INFO L85 PathProgramCache]: Analyzing trace with hash -138643220, now seen corresponding path program 104 times [2021-11-13 18:50:57,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:50:57,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891545934] [2021-11-13 18:50:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:57,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:50:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1378 proven. 4135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:58,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:58,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891545934] [2021-11-13 18:50:58,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891545934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:58,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091071057] [2021-11-13 18:50:58,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:50:58,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:58,861 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:58,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-13 18:50:58,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:50:58,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:50:58,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-13 18:50:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:59,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5513 backedges. 1431 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:50:59,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091071057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:50:59,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:50:59,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 59 [2021-11-13 18:50:59,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127958798] [2021-11-13 18:50:59,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:50:59,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-13 18:50:59,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:50:59,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-13 18:50:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1548, Invalid=1874, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 18:50:59,794 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 18:51:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:00,868 INFO L93 Difference]: Finished difference Result 228 states and 229 transitions. [2021-11-13 18:51:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-13 18:51:00,868 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-11-13 18:51:00,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:00,869 INFO L225 Difference]: With dead ends: 228 [2021-11-13 18:51:00,869 INFO L226 Difference]: Without dead ends: 226 [2021-11-13 18:51:00,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 480 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4738, Invalid=8144, Unknown=0, NotChecked=0, Total=12882 [2021-11-13 18:51:00,870 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 224 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 285.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:00,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 32 Invalid, 772 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [269 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 285.24ms Time] [2021-11-13 18:51:00,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-13 18:51:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 220. [2021-11-13 18:51:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2021-11-13 18:51:00,925 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 216 [2021-11-13 18:51:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:00,926 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2021-11-13 18:51:00,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7288135593220337) internal successors, (220), 59 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 18:51:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2021-11-13 18:51:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 18:51:00,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:00,926 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:00,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-11-13 18:51:01,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:01,127 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:01,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:01,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1443192013, now seen corresponding path program 105 times [2021-11-13 18:51:01,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:01,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054279584] [2021-11-13 18:51:01,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:01,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:04,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:04,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054279584] [2021-11-13 18:51:04,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054279584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:04,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776559707] [2021-11-13 18:51:04,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:51:04,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:04,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:04,124 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:04,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-13 18:51:04,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-11-13 18:51:04,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:04,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-13 18:51:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:04,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 4240 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:05,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776559707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:05,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:05,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111, 111] total 112 [2021-11-13 18:51:05,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740893866] [2021-11-13 18:51:05,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:05,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-13 18:51:05,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-13 18:51:05,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2021-11-13 18:51:05,154 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:07,405 INFO L93 Difference]: Finished difference Result 387 states and 389 transitions. [2021-11-13 18:51:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-13 18:51:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-11-13 18:51:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:07,406 INFO L225 Difference]: With dead ends: 387 [2021-11-13 18:51:07,406 INFO L226 Difference]: Without dead ends: 221 [2021-11-13 18:51:07,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6327, Invalid=21395, Unknown=0, NotChecked=0, Total=27722 [2021-11-13 18:51:07,408 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 7 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 377.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:07,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 579 Invalid, 1172 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [9 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 377.23ms Time] [2021-11-13 18:51:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-13 18:51:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-11-13 18:51:07,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 0 states have call successors, (0), 0 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 18:51:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-11-13 18:51:07,444 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 219 [2021-11-13 18:51:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:07,444 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-11-13 18:51:07,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9732142857142858) internal successors, (221), 112 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-11-13 18:51:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-13 18:51:07,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:07,445 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:07,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:07,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-13 18:51:07,649 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:07,649 INFO L85 PathProgramCache]: Analyzing trace with hash -240107640, now seen corresponding path program 106 times [2021-11-13 18:51:07,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:07,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964614207] [2021-11-13 18:51:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:07,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1431 proven. 4294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:08,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:08,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964614207] [2021-11-13 18:51:08,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964614207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:08,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944013139] [2021-11-13 18:51:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:51:08,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:08,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:08,842 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:08,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-13 18:51:08,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:51:08,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:08,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-13 18:51:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:09,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5725 backedges. 1485 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:09,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944013139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:09,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:09,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 60 [2021-11-13 18:51:09,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900119473] [2021-11-13 18:51:09,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:09,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-13 18:51:09,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:09,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-13 18:51:09,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1604, Invalid=1936, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:51:09,804 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 18:51:10,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:10,894 INFO L93 Difference]: Finished difference Result 232 states and 233 transitions. [2021-11-13 18:51:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-13 18:51:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-11-13 18:51:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:10,895 INFO L225 Difference]: With dead ends: 232 [2021-11-13 18:51:10,895 INFO L226 Difference]: Without dead ends: 230 [2021-11-13 18:51:10,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 489 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3346 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4908, Invalid=8432, Unknown=0, NotChecked=0, Total=13340 [2021-11-13 18:51:10,896 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 175 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.33ms SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:10,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 33 Invalid, 740 Unknown, 0 Unchecked, 1.33ms Time], IncrementalHoareTripleChecker [221 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 278.73ms Time] [2021-11-13 18:51:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-13 18:51:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2021-11-13 18:51:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 18:51:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2021-11-13 18:51:10,932 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 220 [2021-11-13 18:51:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:10,932 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2021-11-13 18:51:10,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7333333333333334) internal successors, (224), 60 states have internal predecessors, (224), 0 states have call successors, (0), 0 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 18:51:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2021-11-13 18:51:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-13 18:51:10,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:10,933 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:10,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-11-13 18:51:11,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-13 18:51:11,137 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:11,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1921335119, now seen corresponding path program 107 times [2021-11-13 18:51:11,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:11,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993849587] [2021-11-13 18:51:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:11,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:14,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:14,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993849587] [2021-11-13 18:51:14,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993849587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:14,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986435521] [2021-11-13 18:51:14,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:51:14,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:14,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:14,217 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:14,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-13 18:51:14,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2021-11-13 18:51:14,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-13 18:51:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:14,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 4401 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:15,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986435521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:15,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:15,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 114 [2021-11-13 18:51:15,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593925335] [2021-11-13 18:51:15,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:15,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-13 18:51:15,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-13 18:51:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2021-11-13 18:51:15,220 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 114 states, 114 states have (on average 1.9736842105263157) internal successors, (225), 114 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 18:51:17,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:17,545 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2021-11-13 18:51:17,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-13 18:51:17,545 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.9736842105263157) internal successors, (225), 114 states have internal predecessors, (225), 0 states have call successors, (0), 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 223 [2021-11-13 18:51:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:17,546 INFO L225 Difference]: With dead ends: 394 [2021-11-13 18:51:17,546 INFO L226 Difference]: Without dead ends: 225 [2021-11-13 18:51:17,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4725 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6554, Invalid=22176, Unknown=0, NotChecked=0, Total=28730 [2021-11-13 18:51:17,547 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 301.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 385.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:17,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 546 Invalid, 1104 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [7 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 385.01ms Time] [2021-11-13 18:51:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-13 18:51:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-11-13 18:51:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 18:51:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2021-11-13 18:51:17,602 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 223 [2021-11-13 18:51:17,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:17,603 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2021-11-13 18:51:17,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.9736842105263157) internal successors, (225), 114 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 18:51:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2021-11-13 18:51:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-13 18:51:17,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:17,604 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:17,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:17,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:17,805 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:17,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1087386132, now seen corresponding path program 108 times [2021-11-13 18:51:17,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:17,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478580438] [2021-11-13 18:51:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:17,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1485 proven. 4456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:19,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:19,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478580438] [2021-11-13 18:51:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478580438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:19,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518556030] [2021-11-13 18:51:19,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:51:19,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:19,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:19,034 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:19,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-13 18:51:19,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-11-13 18:51:19,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:19,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-13 18:51:19,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:19,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5941 backedges. 1540 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:20,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518556030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:20,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:20,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 61 [2021-11-13 18:51:20,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429463661] [2021-11-13 18:51:20,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:20,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-13 18:51:20,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:20,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-13 18:51:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=1999, Unknown=0, NotChecked=0, Total=3660 [2021-11-13 18:51:20,114 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 18:51:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:21,287 INFO L93 Difference]: Finished difference Result 236 states and 237 transitions. [2021-11-13 18:51:21,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-13 18:51:21,287 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 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 224 [2021-11-13 18:51:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:21,288 INFO L225 Difference]: With dead ends: 236 [2021-11-13 18:51:21,288 INFO L226 Difference]: Without dead ends: 234 [2021-11-13 18:51:21,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 498 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3463 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5081, Invalid=8725, Unknown=0, NotChecked=0, Total=13806 [2021-11-13 18:51:21,289 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 180 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 339.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:21,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 26 Invalid, 776 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [225 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 339.17ms Time] [2021-11-13 18:51:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-13 18:51:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-11-13 18:51:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 18:51:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2021-11-13 18:51:21,346 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 224 [2021-11-13 18:51:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:21,346 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2021-11-13 18:51:21,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.737704918032787) internal successors, (228), 61 states have internal predecessors, (228), 0 states have call successors, (0), 0 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 18:51:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2021-11-13 18:51:21,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-13 18:51:21,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:21,347 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:21,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:21,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:21,547 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:21,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1672091699, now seen corresponding path program 109 times [2021-11-13 18:51:21,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:21,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558590533] [2021-11-13 18:51:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:21,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:24,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:24,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558590533] [2021-11-13 18:51:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558590533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:24,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748415968] [2021-11-13 18:51:24,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:51:24,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:24,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:24,719 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:24,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-13 18:51:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-13 18:51:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:25,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 4565 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:25,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748415968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:25,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:25,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115, 115] total 116 [2021-11-13 18:51:25,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129270307] [2021-11-13 18:51:25,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:25,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-13 18:51:25,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-13 18:51:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2021-11-13 18:51:25,646 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 18:51:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:28,030 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2021-11-13 18:51:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-13 18:51:28,030 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 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 227 [2021-11-13 18:51:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:28,031 INFO L225 Difference]: With dead ends: 401 [2021-11-13 18:51:28,031 INFO L226 Difference]: Without dead ends: 229 [2021-11-13 18:51:28,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4895 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6785, Invalid=22971, Unknown=0, NotChecked=0, Total=29756 [2021-11-13 18:51:28,033 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 7 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 285.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 386.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:28,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 513 Invalid, 1039 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [8 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 386.14ms Time] [2021-11-13 18:51:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-13 18:51:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-11-13 18:51:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 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 18:51:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-11-13 18:51:28,084 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 227 [2021-11-13 18:51:28,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:28,084 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-11-13 18:51:28,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9741379310344827) internal successors, (229), 116 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 18:51:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-11-13 18:51:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-13 18:51:28,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:28,085 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:28,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-13 18:51:28,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:28,286 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1510219896, now seen corresponding path program 110 times [2021-11-13 18:51:28,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:28,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904141331] [2021-11-13 18:51:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:28,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1540 proven. 4621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:29,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:29,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904141331] [2021-11-13 18:51:29,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904141331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:29,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527609567] [2021-11-13 18:51:29,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:51:29,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:29,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:29,542 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:29,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-13 18:51:29,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:51:29,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:29,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-13 18:51:29,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:30,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6161 backedges. 1596 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:30,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527609567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:30,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:30,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 62 [2021-11-13 18:51:30,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959008077] [2021-11-13 18:51:30,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:30,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-13 18:51:30,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-13 18:51:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=2063, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 18:51:30,521 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 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 18:51:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:31,686 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2021-11-13 18:51:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-13 18:51:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 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 228 [2021-11-13 18:51:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:31,687 INFO L225 Difference]: With dead ends: 240 [2021-11-13 18:51:31,687 INFO L226 Difference]: Without dead ends: 238 [2021-11-13 18:51:31,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 507 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5257, Invalid=9023, Unknown=0, NotChecked=0, Total=14280 [2021-11-13 18:51:31,688 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 180 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:31,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 39 Invalid, 827 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [228 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 304.14ms Time] [2021-11-13 18:51:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-13 18:51:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 232. [2021-11-13 18:51:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0086580086580086) internal successors, (233), 231 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 18:51:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2021-11-13 18:51:31,728 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 228 [2021-11-13 18:51:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:31,728 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2021-11-13 18:51:31,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7419354838709675) internal successors, (232), 62 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 18:51:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2021-11-13 18:51:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-13 18:51:31,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:31,729 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:31,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:31,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-11-13 18:51:31,929 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:31,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:31,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1173675855, now seen corresponding path program 111 times [2021-11-13 18:51:31,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:31,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994000309] [2021-11-13 18:51:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:31,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:35,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:35,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994000309] [2021-11-13 18:51:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994000309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:35,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751891968] [2021-11-13 18:51:35,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:51:35,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:35,223 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:35,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-13 18:51:35,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2021-11-13 18:51:35,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:35,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-13 18:51:35,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:35,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:35,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 4732 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:36,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751891968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:36,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:36,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 118 [2021-11-13 18:51:36,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598171439] [2021-11-13 18:51:36,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:36,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-13 18:51:36,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:36,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-13 18:51:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2021-11-13 18:51:36,326 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 118 states, 118 states have (on average 1.9745762711864407) internal successors, (233), 118 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 18:51:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:38,763 INFO L93 Difference]: Finished difference Result 408 states and 410 transitions. [2021-11-13 18:51:38,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-13 18:51:38,763 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9745762711864407) internal successors, (233), 118 states have internal predecessors, (233), 0 states have call successors, (0), 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 231 [2021-11-13 18:51:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:38,763 INFO L225 Difference]: With dead ends: 408 [2021-11-13 18:51:38,763 INFO L226 Difference]: Without dead ends: 233 [2021-11-13 18:51:38,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5068 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7020, Invalid=23780, Unknown=0, NotChecked=0, Total=30800 [2021-11-13 18:51:38,765 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 299.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.01ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 362.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:38,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 545 Invalid, 1104 Unknown, 0 Unchecked, 2.01ms Time], IncrementalHoareTripleChecker [9 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 362.65ms Time] [2021-11-13 18:51:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-13 18:51:38,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-11-13 18:51:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 18:51:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2021-11-13 18:51:38,804 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 231 [2021-11-13 18:51:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:38,805 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2021-11-13 18:51:38,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.9745762711864407) internal successors, (233), 118 states have internal predecessors, (233), 0 states have call successors, (0), 0 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 18:51:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2021-11-13 18:51:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-13 18:51:38,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:38,806 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:38,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:39,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-11-13 18:51:39,006 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 203997932, now seen corresponding path program 112 times [2021-11-13 18:51:39,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:39,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94331016] [2021-11-13 18:51:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:39,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1596 proven. 4789 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:40,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:40,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94331016] [2021-11-13 18:51:40,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94331016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:40,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502675447] [2021-11-13 18:51:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:51:40,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:40,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:40,350 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:40,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-13 18:51:40,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:51:40,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:40,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-13 18:51:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:40,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6385 backedges. 1653 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:41,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502675447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:41,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:41,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 63 [2021-11-13 18:51:41,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337375066] [2021-11-13 18:51:41,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:41,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-13 18:51:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-13 18:51:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=2128, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 18:51:41,383 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:42,586 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2021-11-13 18:51:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-13 18:51:42,586 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2021-11-13 18:51:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:42,587 INFO L225 Difference]: With dead ends: 244 [2021-11-13 18:51:42,587 INFO L226 Difference]: Without dead ends: 242 [2021-11-13 18:51:42,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 516 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5436, Invalid=9326, Unknown=0, NotChecked=0, Total=14762 [2021-11-13 18:51:42,588 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 127 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.41ms SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 312.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:42,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 56 Invalid, 849 Unknown, 0 Unchecked, 1.41ms Time], IncrementalHoareTripleChecker [176 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 312.62ms Time] [2021-11-13 18:51:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-13 18:51:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2021-11-13 18:51:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0085106382978724) internal successors, (237), 235 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 18:51:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2021-11-13 18:51:42,630 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 232 [2021-11-13 18:51:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:42,630 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2021-11-13 18:51:42,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.746031746031746) internal successors, (236), 63 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:51:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2021-11-13 18:51:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-13 18:51:42,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:42,631 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:42,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:42,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:42,832 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:42,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:42,832 INFO L85 PathProgramCache]: Analyzing trace with hash -71511347, now seen corresponding path program 113 times [2021-11-13 18:51:42,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:42,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751046622] [2021-11-13 18:51:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:42,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:46,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:46,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751046622] [2021-11-13 18:51:46,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751046622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:46,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693206033] [2021-11-13 18:51:46,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:51:46,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:46,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:46,218 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:46,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-13 18:51:46,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-11-13 18:51:46,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:46,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-13 18:51:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:46,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 4902 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:47,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693206033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:47,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:47,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119, 119] total 120 [2021-11-13 18:51:47,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713055959] [2021-11-13 18:51:47,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:47,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-13 18:51:47,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-13 18:51:47,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2021-11-13 18:51:47,282 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 120 states, 120 states have (on average 1.975) internal successors, (237), 120 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 18:51:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:49,693 INFO L93 Difference]: Finished difference Result 415 states and 417 transitions. [2021-11-13 18:51:49,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-13 18:51:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.975) internal successors, (237), 120 states have internal predecessors, (237), 0 states have call successors, (0), 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 235 [2021-11-13 18:51:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:49,694 INFO L225 Difference]: With dead ends: 415 [2021-11-13 18:51:49,694 INFO L226 Difference]: Without dead ends: 237 [2021-11-13 18:51:49,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7259, Invalid=24603, Unknown=0, NotChecked=0, Total=31862 [2021-11-13 18:51:49,697 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 7 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 301.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:49,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 408 Invalid, 841 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [6 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 301.42ms Time] [2021-11-13 18:51:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-13 18:51:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-11-13 18:51:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 18:51:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-11-13 18:51:49,753 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 235 [2021-11-13 18:51:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:49,753 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-11-13 18:51:49,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.975) internal successors, (237), 120 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 18:51:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-11-13 18:51:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-13 18:51:49,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:49,754 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:49,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-11-13 18:51:49,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-13 18:51:49,954 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -445063288, now seen corresponding path program 114 times [2021-11-13 18:51:49,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:49,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794992486] [2021-11-13 18:51:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:49,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1653 proven. 4960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:51,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:51,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794992486] [2021-11-13 18:51:51,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794992486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:51,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303948353] [2021-11-13 18:51:51,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:51:51,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:51,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:51,347 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:51,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-13 18:51:51,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2021-11-13 18:51:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:51:51,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-13 18:51:51,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:52,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6613 backedges. 1711 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:52,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303948353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:52,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:52,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 64 [2021-11-13 18:51:52,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764843603] [2021-11-13 18:51:52,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:52,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-13 18:51:52,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:52,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-13 18:51:52,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1838, Invalid=2194, Unknown=0, NotChecked=0, Total=4032 [2021-11-13 18:51:52,481 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 18:51:53,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:51:53,725 INFO L93 Difference]: Finished difference Result 248 states and 249 transitions. [2021-11-13 18:51:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-13 18:51:53,726 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2021-11-13 18:51:53,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:51:53,726 INFO L225 Difference]: With dead ends: 248 [2021-11-13 18:51:53,726 INFO L226 Difference]: Without dead ends: 246 [2021-11-13 18:51:53,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3826 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5618, Invalid=9634, Unknown=0, NotChecked=0, Total=15252 [2021-11-13 18:51:53,728 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 186 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 325.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:51:53,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 38 Invalid, 893 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [236 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 325.13ms Time] [2021-11-13 18:51:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-13 18:51:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 240. [2021-11-13 18:51:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.00836820083682) internal successors, (241), 239 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 18:51:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2021-11-13 18:51:53,771 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 236 [2021-11-13 18:51:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:51:53,771 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2021-11-13 18:51:53,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.75) internal successors, (240), 64 states have internal predecessors, (240), 0 states have call successors, (0), 0 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 18:51:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2021-11-13 18:51:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-13 18:51:53,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:51:53,772 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2021-11-13 18:51:53,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-13 18:51:53,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:53,973 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:51:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:51:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash -311549775, now seen corresponding path program 115 times [2021-11-13 18:51:53,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:51:53,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348376802] [2021-11-13 18:51:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:51:53,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:51:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:57,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:51:57,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348376802] [2021-11-13 18:51:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348376802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:51:57,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19572557] [2021-11-13 18:51:57,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:51:57,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:51:57,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:51:57,460 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:51:57,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-13 18:51:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:51:57,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-13 18:51:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:51:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:58,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:51:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 5075 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:51:58,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19572557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:51:58,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:51:58,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121, 121] total 122 [2021-11-13 18:51:58,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708938411] [2021-11-13 18:51:58,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:51:58,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-13 18:51:58,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:51:58,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-13 18:51:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2021-11-13 18:51:58,456 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand has 122 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 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 18:52:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:01,081 INFO L93 Difference]: Finished difference Result 422 states and 424 transitions. [2021-11-13 18:52:01,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-13 18:52:01,081 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 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 239 [2021-11-13 18:52:01,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:01,082 INFO L225 Difference]: With dead ends: 422 [2021-11-13 18:52:01,082 INFO L226 Difference]: Without dead ends: 241 [2021-11-13 18:52:01,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5423 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7502, Invalid=25440, Unknown=0, NotChecked=0, Total=32942 [2021-11-13 18:52:01,085 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 7 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 337.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 408.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:01,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 620 Invalid, 1277 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [10 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 408.93ms Time] [2021-11-13 18:52:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-13 18:52:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-11-13 18:52:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 18:52:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2021-11-13 18:52:01,129 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 239 [2021-11-13 18:52:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:01,141 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2021-11-13 18:52:01,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 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 18:52:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2021-11-13 18:52:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 18:52:01,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:01,142 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:01,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:01,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-13 18:52:01,343 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:01,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:01,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1284462572, now seen corresponding path program 116 times [2021-11-13 18:52:01,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:01,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540969569] [2021-11-13 18:52:01,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:01,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1711 proven. 5134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:02,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:02,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540969569] [2021-11-13 18:52:02,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540969569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:02,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471545072] [2021-11-13 18:52:02,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:52:02,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:02,746 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:02,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-13 18:52:02,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:52:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-13 18:52:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:03,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6845 backedges. 1770 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:03,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471545072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:03,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:03,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 65 [2021-11-13 18:52:03,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116314177] [2021-11-13 18:52:03,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:03,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-13 18:52:03,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-13 18:52:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1899, Invalid=2261, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:52:03,830 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 18:52:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:05,071 INFO L93 Difference]: Finished difference Result 252 states and 253 transitions. [2021-11-13 18:52:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-13 18:52:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 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 18:52:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:05,073 INFO L225 Difference]: With dead ends: 252 [2021-11-13 18:52:05,073 INFO L226 Difference]: Without dead ends: 250 [2021-11-13 18:52:05,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 534 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3951 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5803, Invalid=9947, Unknown=0, NotChecked=0, Total=15750 [2021-11-13 18:52:05,074 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 135 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 310.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:05,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 35 Invalid, 798 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [182 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 310.38ms Time] [2021-11-13 18:52:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-13 18:52:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2021-11-13 18:52:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.008230452674897) internal successors, (245), 243 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 18:52:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2021-11-13 18:52:05,128 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 240 [2021-11-13 18:52:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:05,128 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2021-11-13 18:52:05,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 0 states have call successors, (0), 0 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 18:52:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2021-11-13 18:52:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-13 18:52:05,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:05,129 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:05,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:05,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-11-13 18:52:05,330 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1565662669, now seen corresponding path program 117 times [2021-11-13 18:52:05,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:05,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6101253] [2021-11-13 18:52:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:05,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:08,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:08,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6101253] [2021-11-13 18:52:08,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6101253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:08,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001190984] [2021-11-13 18:52:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:52:08,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:08,926 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:08,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-13 18:52:09,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2021-11-13 18:52:09,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:09,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-13 18:52:09,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:09,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 5251 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:10,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001190984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:10,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:10,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123, 123] total 124 [2021-11-13 18:52:10,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47653275] [2021-11-13 18:52:10,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:10,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-11-13 18:52:10,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:10,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-11-13 18:52:10,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3845, Invalid=11407, Unknown=0, NotChecked=0, Total=15252 [2021-11-13 18:52:10,102 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 124 states, 124 states have (on average 1.9758064516129032) internal successors, (245), 124 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 18:52:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:12,921 INFO L93 Difference]: Finished difference Result 429 states and 431 transitions. [2021-11-13 18:52:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-13 18:52:12,921 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.9758064516129032) internal successors, (245), 124 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-13 18:52:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:12,921 INFO L225 Difference]: With dead ends: 429 [2021-11-13 18:52:12,921 INFO L226 Difference]: Without dead ends: 245 [2021-11-13 18:52:12,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5605 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7749, Invalid=26291, Unknown=0, NotChecked=0, Total=34040 [2021-11-13 18:52:12,923 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 7 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 398.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.74ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 484.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:12,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 748 Invalid, 1538 Unknown, 0 Unchecked, 2.74ms Time], IncrementalHoareTripleChecker [6 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 484.03ms Time] [2021-11-13 18:52:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-13 18:52:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-11-13 18:52:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-11-13 18:52:12,967 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 243 [2021-11-13 18:52:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:12,967 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-11-13 18:52:12,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.9758064516129032) internal successors, (245), 124 states have internal predecessors, (245), 0 states have call successors, (0), 0 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 18:52:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-11-13 18:52:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-13 18:52:12,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:12,968 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:12,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:13,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:13,168 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1312767880, now seen corresponding path program 118 times [2021-11-13 18:52:13,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:13,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347196953] [2021-11-13 18:52:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:13,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1770 proven. 5311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:14,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:14,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347196953] [2021-11-13 18:52:14,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347196953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:14,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936780139] [2021-11-13 18:52:14,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:52:14,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:14,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:14,690 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:14,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-11-13 18:52:14,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:52:14,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-13 18:52:14,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:15,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7081 backedges. 1830 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:15,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936780139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:15,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:15,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 66 [2021-11-13 18:52:15,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564393469] [2021-11-13 18:52:15,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:15,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-13 18:52:15,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:15,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-13 18:52:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=2329, Unknown=0, NotChecked=0, Total=4290 [2021-11-13 18:52:15,763 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 18:52:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:17,136 INFO L93 Difference]: Finished difference Result 256 states and 257 transitions. [2021-11-13 18:52:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-13 18:52:17,137 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 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 244 [2021-11-13 18:52:17,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:17,137 INFO L225 Difference]: With dead ends: 256 [2021-11-13 18:52:17,137 INFO L226 Difference]: Without dead ends: 254 [2021-11-13 18:52:17,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 543 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4078 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5991, Invalid=10265, Unknown=0, NotChecked=0, Total=16256 [2021-11-13 18:52:17,138 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 199 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 316.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 374.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:17,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 36 Invalid, 831 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [245 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 374.32ms Time] [2021-11-13 18:52:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-13 18:52:17,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2021-11-13 18:52:17,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 18:52:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 249 transitions. [2021-11-13 18:52:17,183 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 249 transitions. Word has length 244 [2021-11-13 18:52:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:17,183 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 249 transitions. [2021-11-13 18:52:17,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.757575757575758) internal successors, (248), 66 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 18:52:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 249 transitions. [2021-11-13 18:52:17,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-13 18:52:17,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:17,184 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:17,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-11-13 18:52:17,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:17,385 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:17,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1299464015, now seen corresponding path program 119 times [2021-11-13 18:52:17,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:17,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224985802] [2021-11-13 18:52:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:17,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:21,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:21,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:21,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224985802] [2021-11-13 18:52:21,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224985802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:21,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910827581] [2021-11-13 18:52:21,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:52:21,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:21,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:21,137 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:21,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-11-13 18:52:21,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2021-11-13 18:52:21,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-13 18:52:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:21,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 5430 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:22,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910827581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:22,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:22,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125, 125] total 126 [2021-11-13 18:52:22,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578122950] [2021-11-13 18:52:22,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:22,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-13 18:52:22,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-13 18:52:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3970, Invalid=11780, Unknown=0, NotChecked=0, Total=15750 [2021-11-13 18:52:22,326 INFO L87 Difference]: Start difference. First operand 248 states and 249 transitions. Second operand has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 18:52:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:25,092 INFO L93 Difference]: Finished difference Result 436 states and 438 transitions. [2021-11-13 18:52:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-13 18:52:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 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 247 [2021-11-13 18:52:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:25,093 INFO L225 Difference]: With dead ends: 436 [2021-11-13 18:52:25,093 INFO L226 Difference]: Without dead ends: 249 [2021-11-13 18:52:25,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5790 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8000, Invalid=27156, Unknown=0, NotChecked=0, Total=35156 [2021-11-13 18:52:25,094 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 7 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 358.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 431.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:25,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 652 Invalid, 1308 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [6 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 431.87ms Time] [2021-11-13 18:52:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-13 18:52:25,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-13 18:52:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 18:52:25,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2021-11-13 18:52:25,140 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 247 [2021-11-13 18:52:25,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:25,140 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2021-11-13 18:52:25,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.9761904761904763) internal successors, (249), 126 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 18:52:25,140 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2021-11-13 18:52:25,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-13 18:52:25,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:25,141 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:25,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-11-13 18:52:25,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:25,341 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1078693100, now seen corresponding path program 120 times [2021-11-13 18:52:25,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:25,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048281841] [2021-11-13 18:52:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:25,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1830 proven. 5491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:26,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:26,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048281841] [2021-11-13 18:52:26,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048281841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:26,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818155508] [2021-11-13 18:52:26,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:52:26,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:26,820 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:26,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-13 18:52:27,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-11-13 18:52:27,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:27,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-13 18:52:27,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:27,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7321 backedges. 1891 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:28,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818155508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:28,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:28,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 67 [2021-11-13 18:52:28,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963044375] [2021-11-13 18:52:28,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:28,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-13 18:52:28,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-13 18:52:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=2398, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 18:52:28,030 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:29,351 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2021-11-13 18:52:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-13 18:52:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 248 [2021-11-13 18:52:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:29,352 INFO L225 Difference]: With dead ends: 260 [2021-11-13 18:52:29,352 INFO L226 Difference]: Without dead ends: 258 [2021-11-13 18:52:29,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 552 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4207 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6182, Invalid=10588, Unknown=0, NotChecked=0, Total=16770 [2021-11-13 18:52:29,353 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 324.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:29,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 38 Invalid, 848 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [188 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 324.03ms Time] [2021-11-13 18:52:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-13 18:52:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2021-11-13 18:52:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0079681274900398) internal successors, (253), 251 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:29,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2021-11-13 18:52:29,412 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 248 [2021-11-13 18:52:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:29,412 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2021-11-13 18:52:29,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.7611940298507465) internal successors, (252), 67 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:29,412 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2021-11-13 18:52:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-13 18:52:29,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:29,413 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:29,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:29,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:29,614 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:29,614 INFO L85 PathProgramCache]: Analyzing trace with hash 405653709, now seen corresponding path program 121 times [2021-11-13 18:52:29,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:29,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525185286] [2021-11-13 18:52:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:29,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:33,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:33,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525185286] [2021-11-13 18:52:33,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525185286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:33,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577922991] [2021-11-13 18:52:33,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:52:33,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:33,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:33,458 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:33,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-11-13 18:52:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:33,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-13 18:52:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:34,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 5612 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:34,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577922991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:34,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:34,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127, 127] total 128 [2021-11-13 18:52:34,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202703514] [2021-11-13 18:52:34,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:34,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-13 18:52:34,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-13 18:52:34,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=12159, Unknown=0, NotChecked=0, Total=16256 [2021-11-13 18:52:34,482 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand has 128 states, 128 states have (on average 1.9765625) internal successors, (253), 128 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:37,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:37,289 INFO L93 Difference]: Finished difference Result 443 states and 445 transitions. [2021-11-13 18:52:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-13 18:52:37,289 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.9765625) internal successors, (253), 128 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-13 18:52:37,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:37,289 INFO L225 Difference]: With dead ends: 443 [2021-11-13 18:52:37,289 INFO L226 Difference]: Without dead ends: 253 [2021-11-13 18:52:37,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5978 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8255, Invalid=28035, Unknown=0, NotChecked=0, Total=36290 [2021-11-13 18:52:37,291 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 7 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 313.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 379.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:37,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 567 Invalid, 1143 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [8 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 379.07ms Time] [2021-11-13 18:52:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-13 18:52:37,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-11-13 18:52:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.007936507936508) internal successors, (254), 252 states have internal predecessors, (254), 0 states have call successors, (0), 0 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 18:52:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2021-11-13 18:52:37,338 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 251 [2021-11-13 18:52:37,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:37,338 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2021-11-13 18:52:37,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.9765625) internal successors, (253), 128 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:37,338 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2021-11-13 18:52:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-13 18:52:37,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:37,339 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:37,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-11-13 18:52:37,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:37,540 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:37,540 INFO L85 PathProgramCache]: Analyzing trace with hash -328794232, now seen corresponding path program 122 times [2021-11-13 18:52:37,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:37,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951593965] [2021-11-13 18:52:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:37,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1891 proven. 5674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:39,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:39,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951593965] [2021-11-13 18:52:39,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951593965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:39,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634334103] [2021-11-13 18:52:39,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:52:39,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:39,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:39,066 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:39,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-11-13 18:52:39,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:52:39,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:39,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-13 18:52:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:39,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7565 backedges. 1953 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634334103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:40,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:40,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 68 [2021-11-13 18:52:40,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562597033] [2021-11-13 18:52:40,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:40,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-13 18:52:40,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-13 18:52:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=2468, Unknown=0, NotChecked=0, Total=4556 [2021-11-13 18:52:40,172 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:41,534 INFO L93 Difference]: Finished difference Result 264 states and 265 transitions. [2021-11-13 18:52:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-13 18:52:41,534 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2021-11-13 18:52:41,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:41,535 INFO L225 Difference]: With dead ends: 264 [2021-11-13 18:52:41,535 INFO L226 Difference]: Without dead ends: 262 [2021-11-13 18:52:41,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 561 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4338 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6376, Invalid=10916, Unknown=0, NotChecked=0, Total=17292 [2021-11-13 18:52:41,536 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 197 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 333.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:41,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 35 Invalid, 896 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [253 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 333.11ms Time] [2021-11-13 18:52:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-13 18:52:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 256. [2021-11-13 18:52:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.007843137254902) internal successors, (257), 255 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 18:52:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2021-11-13 18:52:41,584 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 252 [2021-11-13 18:52:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:41,584 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2021-11-13 18:52:41,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.764705882352941) internal successors, (256), 68 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2021-11-13 18:52:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-13 18:52:41,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:41,585 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:41,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-11-13 18:52:41,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-11-13 18:52:41,786 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1716256945, now seen corresponding path program 123 times [2021-11-13 18:52:41,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:41,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960562789] [2021-11-13 18:52:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:41,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:45,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:45,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960562789] [2021-11-13 18:52:45,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960562789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:45,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731787705] [2021-11-13 18:52:45,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:52:45,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:45,737 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:45,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-13 18:52:46,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2021-11-13 18:52:46,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-13 18:52:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:46,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 5797 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:46,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731787705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:46,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:46,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 130 [2021-11-13 18:52:46,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625601965] [2021-11-13 18:52:46,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:46,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-13 18:52:46,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-13 18:52:46,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4226, Invalid=12544, Unknown=0, NotChecked=0, Total=16770 [2021-11-13 18:52:46,983 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 130 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 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 18:52:49,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:49,913 INFO L93 Difference]: Finished difference Result 450 states and 452 transitions. [2021-11-13 18:52:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-13 18:52:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 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 255 [2021-11-13 18:52:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:49,914 INFO L225 Difference]: With dead ends: 450 [2021-11-13 18:52:49,914 INFO L226 Difference]: Without dead ends: 257 [2021-11-13 18:52:49,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6169 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8514, Invalid=28928, Unknown=0, NotChecked=0, Total=37442 [2021-11-13 18:52:49,916 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 7 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 343.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 416.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:49,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 620 Invalid, 1279 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [8 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 416.15ms Time] [2021-11-13 18:52:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-13 18:52:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2021-11-13 18:52:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.0078125) internal successors, (258), 256 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:52:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2021-11-13 18:52:49,964 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 255 [2021-11-13 18:52:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:49,964 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2021-11-13 18:52:49,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.976923076923077) internal successors, (257), 130 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 18:52:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2021-11-13 18:52:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-13 18:52:49,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:49,965 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:49,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-11-13 18:52:50,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-11-13 18:52:50,166 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:50,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2034590188, now seen corresponding path program 124 times [2021-11-13 18:52:50,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:50,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052536715] [2021-11-13 18:52:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:50,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 1953 proven. 5860 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:51,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:51,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052536715] [2021-11-13 18:52:51,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052536715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:51,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414134085] [2021-11-13 18:52:51,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:52:51,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:51,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:51,731 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:51,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-11-13 18:52:51,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:52:51,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:51,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-13 18:52:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:52,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7813 backedges. 2016 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:52,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414134085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:52,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:52,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 69 [2021-11-13 18:52:52,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578832953] [2021-11-13 18:52:52,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:52,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-13 18:52:52,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-13 18:52:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2153, Invalid=2539, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 18:52:52,846 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 18:52:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:54,236 INFO L93 Difference]: Finished difference Result 268 states and 269 transitions. [2021-11-13 18:52:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-13 18:52:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 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 256 [2021-11-13 18:52:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:54,237 INFO L225 Difference]: With dead ends: 268 [2021-11-13 18:52:54,237 INFO L226 Difference]: Without dead ends: 266 [2021-11-13 18:52:54,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 570 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4471 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6573, Invalid=11249, Unknown=0, NotChecked=0, Total=17822 [2021-11-13 18:52:54,238 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 274 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 282.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 341.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:54,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 37 Invalid, 928 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [319 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 341.19ms Time] [2021-11-13 18:52:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-13 18:52:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2021-11-13 18:52:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0077220077220077) internal successors, (261), 259 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 18:52:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2021-11-13 18:52:54,287 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 256 [2021-11-13 18:52:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2021-11-13 18:52:54,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.7681159420289854) internal successors, (260), 69 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 18:52:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2021-11-13 18:52:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-13 18:52:54,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:54,289 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:54,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-11-13 18:52:54,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-11-13 18:52:54,489 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1902629837, now seen corresponding path program 125 times [2021-11-13 18:52:54,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:54,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838163709] [2021-11-13 18:52:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:54,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:58,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:58,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838163709] [2021-11-13 18:52:58,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838163709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:52:58,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795532049] [2021-11-13 18:52:58,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:52:58,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:52:58,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:58,568 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:52:58,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-11-13 18:52:58,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2021-11-13 18:52:58,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:52:58,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 130 conjunts are in the unsatisfiable core [2021-11-13 18:52:58,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:52:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:59,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:52:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 5985 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:52:59,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795532049] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:52:59,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:52:59,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 132 [2021-11-13 18:52:59,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907568240] [2021-11-13 18:52:59,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:52:59,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-13 18:52:59,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:59,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-13 18:52:59,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4357, Invalid=12935, Unknown=0, NotChecked=0, Total=17292 [2021-11-13 18:52:59,776 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand has 132 states, 132 states have (on average 1.9772727272727273) internal successors, (261), 132 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 18:53:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:02,694 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2021-11-13 18:53:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-13 18:53:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.9772727272727273) internal successors, (261), 132 states have internal predecessors, (261), 0 states have call successors, (0), 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 259 [2021-11-13 18:53:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:02,695 INFO L225 Difference]: With dead ends: 457 [2021-11-13 18:53:02,695 INFO L226 Difference]: Without dead ends: 261 [2021-11-13 18:53:02,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6363 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8777, Invalid=29835, Unknown=0, NotChecked=0, Total=38612 [2021-11-13 18:53:02,696 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 7 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 296.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 358.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:02,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 514 Invalid, 1059 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [10 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 358.90ms Time] [2021-11-13 18:53:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-13 18:53:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-11-13 18:53:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 18:53:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2021-11-13 18:53:02,746 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 259 [2021-11-13 18:53:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:02,746 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2021-11-13 18:53:02,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.9772727272727273) internal successors, (261), 132 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 18:53:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2021-11-13 18:53:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-13 18:53:02,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:02,748 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:02,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-11-13 18:53:02,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-11-13 18:53:02,953 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:02,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1173872760, now seen corresponding path program 126 times [2021-11-13 18:53:02,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:02,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057484879] [2021-11-13 18:53:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:02,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2016 proven. 6049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:04,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:04,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057484879] [2021-11-13 18:53:04,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057484879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:04,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203755207] [2021-11-13 18:53:04,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:53:04,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:04,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:04,567 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-11-13 18:53:04,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2021-11-13 18:53:04,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:53:04,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-13 18:53:04,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:05,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8065 backedges. 2080 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:05,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203755207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:05,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:53:05,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 70 [2021-11-13 18:53:05,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454297511] [2021-11-13 18:53:05,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:05,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-13 18:53:05,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:05,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-13 18:53:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=2611, Unknown=0, NotChecked=0, Total=4830 [2021-11-13 18:53:05,849 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 18:53:07,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:07,252 INFO L93 Difference]: Finished difference Result 272 states and 273 transitions. [2021-11-13 18:53:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-13 18:53:07,253 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 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 260 [2021-11-13 18:53:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:07,253 INFO L225 Difference]: With dead ends: 272 [2021-11-13 18:53:07,254 INFO L226 Difference]: Without dead ends: 270 [2021-11-13 18:53:07,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 579 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4606 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6773, Invalid=11587, Unknown=0, NotChecked=0, Total=18360 [2021-11-13 18:53:07,255 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 266.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.52ms SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 321.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:07,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 29 Invalid, 842 Unknown, 0 Unchecked, 1.52ms Time], IncrementalHoareTripleChecker [197 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 321.55ms Time] [2021-11-13 18:53:07,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-13 18:53:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-11-13 18:53:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0076045627376427) internal successors, (265), 263 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 18:53:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 265 transitions. [2021-11-13 18:53:07,307 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 265 transitions. Word has length 260 [2021-11-13 18:53:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:07,307 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 265 transitions. [2021-11-13 18:53:07,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.7714285714285714) internal successors, (264), 70 states have internal predecessors, (264), 0 states have call successors, (0), 0 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 18:53:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 265 transitions. [2021-11-13 18:53:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-13 18:53:07,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:07,309 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:07,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:07,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:07,513 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1214848847, now seen corresponding path program 127 times [2021-11-13 18:53:07,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:07,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041654506] [2021-11-13 18:53:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:07,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:11,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041654506] [2021-11-13 18:53:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041654506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112446103] [2021-11-13 18:53:11,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:53:11,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:11,744 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:11,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-11-13 18:53:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-13 18:53:11,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:12,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 6176 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:12,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112446103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:12,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:53:12,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 134 [2021-11-13 18:53:12,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643599178] [2021-11-13 18:53:12,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:12,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2021-11-13 18:53:12,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:12,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-11-13 18:53:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4490, Invalid=13332, Unknown=0, NotChecked=0, Total=17822 [2021-11-13 18:53:12,820 INFO L87 Difference]: Start difference. First operand 264 states and 265 transitions. Second operand has 134 states, 134 states have (on average 1.9776119402985075) internal successors, (265), 134 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 18:53:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:15,849 INFO L93 Difference]: Finished difference Result 464 states and 466 transitions. [2021-11-13 18:53:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-13 18:53:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.9776119402985075) internal successors, (265), 134 states have internal predecessors, (265), 0 states have call successors, (0), 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 263 [2021-11-13 18:53:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:15,850 INFO L225 Difference]: With dead ends: 464 [2021-11-13 18:53:15,850 INFO L226 Difference]: Without dead ends: 265 [2021-11-13 18:53:15,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6560 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=9044, Invalid=30756, Unknown=0, NotChecked=0, Total=39800 [2021-11-13 18:53:15,852 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 7 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 386.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:15,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 561 Invalid, 1157 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [7 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 386.05ms Time] [2021-11-13 18:53:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-13 18:53:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2021-11-13 18:53:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 18:53:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2021-11-13 18:53:15,903 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 263 [2021-11-13 18:53:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:15,904 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2021-11-13 18:53:15,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.9776119402985075) internal successors, (265), 134 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 18:53:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2021-11-13 18:53:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-11-13 18:53:15,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:15,905 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:15,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-11-13 18:53:16,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-11-13 18:53:16,109 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:16,109 INFO L85 PathProgramCache]: Analyzing trace with hash -614148372, now seen corresponding path program 128 times [2021-11-13 18:53:16,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:16,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374962469] [2021-11-13 18:53:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:16,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2080 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:17,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:17,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374962469] [2021-11-13 18:53:17,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374962469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:17,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158816755] [2021-11-13 18:53:17,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:53:17,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:17,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:17,768 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:17,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-11-13 18:53:17,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:53:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:53:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-13 18:53:17,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:18,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8321 backedges. 2145 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:18,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158816755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:18,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:53:18,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 71 [2021-11-13 18:53:18,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528363974] [2021-11-13 18:53:18,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:18,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-13 18:53:18,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:18,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-13 18:53:18,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2286, Invalid=2684, Unknown=0, NotChecked=0, Total=4970 [2021-11-13 18:53:18,911 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:20,380 INFO L93 Difference]: Finished difference Result 276 states and 277 transitions. [2021-11-13 18:53:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-11-13 18:53:20,380 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-11-13 18:53:20,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:20,381 INFO L225 Difference]: With dead ends: 276 [2021-11-13 18:53:20,381 INFO L226 Difference]: Without dead ends: 274 [2021-11-13 18:53:20,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 588 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4743 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6976, Invalid=11930, Unknown=0, NotChecked=0, Total=18906 [2021-11-13 18:53:20,382 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 274 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 303.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 365.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:20,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 35 Invalid, 969 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [329 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 365.02ms Time] [2021-11-13 18:53:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-13 18:53:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2021-11-13 18:53:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.0074906367041199) internal successors, (269), 267 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 18:53:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2021-11-13 18:53:20,445 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 264 [2021-11-13 18:53:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:20,445 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2021-11-13 18:53:20,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.7746478873239435) internal successors, (268), 71 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2021-11-13 18:53:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-13 18:53:20,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:20,446 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:20,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-11-13 18:53:20,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-11-13 18:53:20,647 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:20,647 INFO L85 PathProgramCache]: Analyzing trace with hash 471350989, now seen corresponding path program 129 times [2021-11-13 18:53:20,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:20,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509018993] [2021-11-13 18:53:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:20,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:24,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:24,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509018993] [2021-11-13 18:53:24,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509018993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:24,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719711552] [2021-11-13 18:53:24,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:53:24,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:24,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:24,976 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:24,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-11-13 18:53:25,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2021-11-13 18:53:25,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:53:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-13 18:53:25,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:25,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 6370 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:26,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719711552] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:26,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:53:26,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135, 135] total 136 [2021-11-13 18:53:26,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054901992] [2021-11-13 18:53:26,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:26,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2021-11-13 18:53:26,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:26,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-11-13 18:53:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4625, Invalid=13735, Unknown=0, NotChecked=0, Total=18360 [2021-11-13 18:53:26,286 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 18:53:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:29,440 INFO L93 Difference]: Finished difference Result 471 states and 473 transitions. [2021-11-13 18:53:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-11-13 18:53:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 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 267 [2021-11-13 18:53:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:29,441 INFO L225 Difference]: With dead ends: 471 [2021-11-13 18:53:29,441 INFO L226 Difference]: Without dead ends: 269 [2021-11-13 18:53:29,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 734 GetRequests, 533 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6760 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9315, Invalid=31691, Unknown=0, NotChecked=0, Total=41006 [2021-11-13 18:53:29,442 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 7 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 342.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.38ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 414.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:29,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 616 Invalid, 1258 Unknown, 0 Unchecked, 2.38ms Time], IncrementalHoareTripleChecker [6 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 414.16ms Time] [2021-11-13 18:53:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-13 18:53:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-11-13 18:53:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 0 states have call successors, (0), 0 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 18:53:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-11-13 18:53:29,495 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 267 [2021-11-13 18:53:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:29,495 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-11-13 18:53:29,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.9779411764705883) internal successors, (269), 136 states have internal predecessors, (269), 0 states have call successors, (0), 0 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 18:53:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-11-13 18:53:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-13 18:53:29,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:29,496 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:29,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-11-13 18:53:29,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:29,697 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash 523935624, now seen corresponding path program 130 times [2021-11-13 18:53:29,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:29,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087272867] [2021-11-13 18:53:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:29,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2145 proven. 6436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:31,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:31,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087272867] [2021-11-13 18:53:31,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087272867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:31,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748352264] [2021-11-13 18:53:31,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:53:31,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:31,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:31,431 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:31,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-11-13 18:53:31,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:53:31,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:53:31,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 135 conjunts are in the unsatisfiable core [2021-11-13 18:53:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:32,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8581 backedges. 2211 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:32,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748352264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:32,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:53:32,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 72 [2021-11-13 18:53:32,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940894109] [2021-11-13 18:53:32,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:32,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-13 18:53:32,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-13 18:53:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2354, Invalid=2758, Unknown=0, NotChecked=0, Total=5112 [2021-11-13 18:53:32,669 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 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 18:53:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:34,185 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2021-11-13 18:53:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-13 18:53:34,186 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-11-13 18:53:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:34,186 INFO L225 Difference]: With dead ends: 280 [2021-11-13 18:53:34,186 INFO L226 Difference]: Without dead ends: 278 [2021-11-13 18:53:34,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 597 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4882 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7182, Invalid=12278, Unknown=0, NotChecked=0, Total=19460 [2021-11-13 18:53:34,188 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 214 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 299.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 361.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:34,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 37 Invalid, 980 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [268 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 361.16ms Time] [2021-11-13 18:53:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-13 18:53:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 272. [2021-11-13 18:53:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.007380073800738) internal successors, (273), 271 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 273 transitions. [2021-11-13 18:53:34,242 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 273 transitions. Word has length 268 [2021-11-13 18:53:34,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:34,242 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 273 transitions. [2021-11-13 18:53:34,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.7777777777777777) internal successors, (272), 72 states have internal predecessors, (272), 0 states have call successors, (0), 0 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 18:53:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 273 transitions. [2021-11-13 18:53:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-13 18:53:34,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:34,243 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:34,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-11-13 18:53:34,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:34,443 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash 659841201, now seen corresponding path program 131 times [2021-11-13 18:53:34,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:34,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300343974] [2021-11-13 18:53:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:34,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:38,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:38,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300343974] [2021-11-13 18:53:38,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300343974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:38,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138946663] [2021-11-13 18:53:38,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:53:38,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:38,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:38,919 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:38,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-11-13 18:53:39,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2021-11-13 18:53:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:53:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-13 18:53:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:39,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:39,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6567 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:40,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138946663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:40,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:53:40,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137, 137] total 138 [2021-11-13 18:53:40,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418862268] [2021-11-13 18:53:40,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:40,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2021-11-13 18:53:40,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:40,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-11-13 18:53:40,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4762, Invalid=14144, Unknown=0, NotChecked=0, Total=18906 [2021-11-13 18:53:40,180 INFO L87 Difference]: Start difference. First operand 272 states and 273 transitions. Second operand has 138 states, 138 states have (on average 1.9782608695652173) internal successors, (273), 138 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:43,565 INFO L93 Difference]: Finished difference Result 478 states and 480 transitions. [2021-11-13 18:53:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-11-13 18:53:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.9782608695652173) internal successors, (273), 138 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-13 18:53:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:43,566 INFO L225 Difference]: With dead ends: 478 [2021-11-13 18:53:43,566 INFO L226 Difference]: Without dead ends: 273 [2021-11-13 18:53:43,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6963 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=9590, Invalid=32640, Unknown=0, NotChecked=0, Total=42230 [2021-11-13 18:53:43,568 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 7 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 448.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 540.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:43,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 820 Invalid, 1656 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [7 Valid, 1649 Invalid, 0 Unknown, 0 Unchecked, 540.77ms Time] [2021-11-13 18:53:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-13 18:53:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-11-13 18:53:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 states have internal predecessors, (274), 0 states have call successors, (0), 0 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 18:53:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2021-11-13 18:53:43,652 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 271 [2021-11-13 18:53:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2021-11-13 18:53:43,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.9782608695652173) internal successors, (273), 138 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:53:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2021-11-13 18:53:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-13 18:53:43,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:43,654 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:43,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:43,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:43,854 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:43,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash 479325164, now seen corresponding path program 132 times [2021-11-13 18:53:43,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:43,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165610329] [2021-11-13 18:53:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:43,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2211 proven. 6634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:45,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:45,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165610329] [2021-11-13 18:53:45,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165610329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:45,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915194868] [2021-11-13 18:53:45,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:53:45,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:45,626 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:45,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-11-13 18:53:45,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-11-13 18:53:45,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:53:45,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 137 conjunts are in the unsatisfiable core [2021-11-13 18:53:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2278 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:46,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8845 backedges. 2278 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:46,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915194868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:46,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:53:46,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 73 [2021-11-13 18:53:46,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616693664] [2021-11-13 18:53:46,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:46,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-13 18:53:46,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-13 18:53:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2423, Invalid=2833, Unknown=0, NotChecked=0, Total=5256 [2021-11-13 18:53:46,957 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 18:53:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:48,512 INFO L93 Difference]: Finished difference Result 284 states and 285 transitions. [2021-11-13 18:53:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-11-13 18:53:48,512 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 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 272 [2021-11-13 18:53:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:48,513 INFO L225 Difference]: With dead ends: 284 [2021-11-13 18:53:48,513 INFO L226 Difference]: Without dead ends: 282 [2021-11-13 18:53:48,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 606 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7391, Invalid=12631, Unknown=0, NotChecked=0, Total=20022 [2021-11-13 18:53:48,515 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 214 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 307.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 368.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:48,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 35 Invalid, 920 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [273 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 368.25ms Time] [2021-11-13 18:53:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-13 18:53:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 276. [2021-11-13 18:53:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.0072727272727273) internal successors, (277), 275 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 18:53:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2021-11-13 18:53:48,570 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 272 [2021-11-13 18:53:48,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:48,570 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2021-11-13 18:53:48,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.780821917808219) internal successors, (276), 73 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 18:53:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2021-11-13 18:53:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-13 18:53:48,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:48,571 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:48,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:48,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-11-13 18:53:48,772 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:48,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:48,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1185478195, now seen corresponding path program 133 times [2021-11-13 18:53:48,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:48,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143323601] [2021-11-13 18:53:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:48,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:53,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:53,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143323601] [2021-11-13 18:53:53,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143323601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:53,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101503285] [2021-11-13 18:53:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:53:53,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:53,369 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:53,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-11-13 18:53:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:53,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 138 conjunts are in the unsatisfiable core [2021-11-13 18:53:53,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:54,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:53:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 6767 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:53:54,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101503285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:53:54,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:53:54,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 140 [2021-11-13 18:53:54,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796432338] [2021-11-13 18:53:54,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:53:54,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2021-11-13 18:53:54,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-11-13 18:53:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=14559, Unknown=0, NotChecked=0, Total=19460 [2021-11-13 18:53:54,513 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand has 140 states, 140 states have (on average 1.9785714285714286) internal successors, (277), 140 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 18:53:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:57,939 INFO L93 Difference]: Finished difference Result 485 states and 487 transitions. [2021-11-13 18:53:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-13 18:53:57,939 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9785714285714286) internal successors, (277), 140 states have internal predecessors, (277), 0 states have call successors, (0), 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 275 [2021-11-13 18:53:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:57,940 INFO L225 Difference]: With dead ends: 485 [2021-11-13 18:53:57,940 INFO L226 Difference]: Without dead ends: 277 [2021-11-13 18:53:57,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7169 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9869, Invalid=33603, Unknown=0, NotChecked=0, Total=43472 [2021-11-13 18:53:57,942 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 7 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 414.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 502.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:57,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 772 Invalid, 1562 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [7 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 502.50ms Time] [2021-11-13 18:53:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-13 18:53:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-11-13 18:53:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0072463768115942) internal successors, (278), 276 states have internal predecessors, (278), 0 states have call successors, (0), 0 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 18:53:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2021-11-13 18:53:58,014 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 275 [2021-11-13 18:53:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:58,014 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2021-11-13 18:53:58,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.9785714285714286) internal successors, (277), 140 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 18:53:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2021-11-13 18:53:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-13 18:53:58,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:58,015 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:58,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-11-13 18:53:58,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-11-13 18:53:58,216 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1914077064, now seen corresponding path program 134 times [2021-11-13 18:53:58,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:58,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290360324] [2021-11-13 18:53:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:58,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2278 proven. 6835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:00,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:00,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290360324] [2021-11-13 18:54:00,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290360324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:00,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674534178] [2021-11-13 18:54:00,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:54:00,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:00,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:00,026 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:00,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-11-13 18:54:00,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:54:00,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:00,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 139 conjunts are in the unsatisfiable core [2021-11-13 18:54:00,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2346 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:00,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9113 backedges. 2346 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:01,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674534178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:01,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:01,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72, 72] total 74 [2021-11-13 18:54:01,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334994121] [2021-11-13 18:54:01,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:01,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-13 18:54:01,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-13 18:54:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2493, Invalid=2909, Unknown=0, NotChecked=0, Total=5402 [2021-11-13 18:54:01,212 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:02,835 INFO L93 Difference]: Finished difference Result 288 states and 289 transitions. [2021-11-13 18:54:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-13 18:54:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 276 [2021-11-13 18:54:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:02,836 INFO L225 Difference]: With dead ends: 288 [2021-11-13 18:54:02,836 INFO L226 Difference]: Without dead ends: 286 [2021-11-13 18:54:02,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 615 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5166 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7603, Invalid=12989, Unknown=0, NotChecked=0, Total=20592 [2021-11-13 18:54:02,837 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 284 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 317.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 382.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:02,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 34 Invalid, 1017 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [344 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 382.77ms Time] [2021-11-13 18:54:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-13 18:54:02,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2021-11-13 18:54:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.007168458781362) internal successors, (281), 279 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 18:54:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2021-11-13 18:54:02,894 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 276 [2021-11-13 18:54:02,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:02,894 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2021-11-13 18:54:02,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.7837837837837838) internal successors, (280), 74 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:02,895 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2021-11-13 18:54:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-13 18:54:02,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:02,896 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:02,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:03,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-11-13 18:54:03,096 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:03,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2006155087, now seen corresponding path program 135 times [2021-11-13 18:54:03,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:03,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252052325] [2021-11-13 18:54:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:03,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:07,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:07,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252052325] [2021-11-13 18:54:07,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252052325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:07,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921830044] [2021-11-13 18:54:07,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:54:07,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:07,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:07,836 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:07,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-11-13 18:54:08,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-11-13 18:54:08,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 140 conjunts are in the unsatisfiable core [2021-11-13 18:54:08,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:08,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 6970 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:09,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921830044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:09,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:09,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141, 141] total 142 [2021-11-13 18:54:09,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586468004] [2021-11-13 18:54:09,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:09,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2021-11-13 18:54:09,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:09,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-11-13 18:54:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5042, Invalid=14980, Unknown=0, NotChecked=0, Total=20022 [2021-11-13 18:54:09,210 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand has 142 states, 142 states have (on average 1.9788732394366197) internal successors, (281), 142 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 18:54:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:12,616 INFO L93 Difference]: Finished difference Result 492 states and 494 transitions. [2021-11-13 18:54:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-11-13 18:54:12,616 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.9788732394366197) internal successors, (281), 142 states have internal predecessors, (281), 0 states have call successors, (0), 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 279 [2021-11-13 18:54:12,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:12,617 INFO L225 Difference]: With dead ends: 492 [2021-11-13 18:54:12,617 INFO L226 Difference]: Without dead ends: 281 [2021-11-13 18:54:12,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7378 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=10152, Invalid=34580, Unknown=0, NotChecked=0, Total=44732 [2021-11-13 18:54:12,619 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 7 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 351.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 438.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:12,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 595 Invalid, 1209 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [8 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 438.30ms Time] [2021-11-13 18:54:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-13 18:54:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-11-13 18:54:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0071428571428571) internal successors, (282), 280 states have internal predecessors, (282), 0 states have call successors, (0), 0 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 18:54:12,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2021-11-13 18:54:12,677 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 279 [2021-11-13 18:54:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:12,677 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2021-11-13 18:54:12,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 1.9788732394366197) internal successors, (281), 142 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 18:54:12,677 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2021-11-13 18:54:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-13 18:54:12,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:12,678 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:12,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-11-13 18:54:12,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-11-13 18:54:12,893 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:12,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1152688364, now seen corresponding path program 136 times [2021-11-13 18:54:12,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:12,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125170937] [2021-11-13 18:54:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:12,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2346 proven. 7039 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:14,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:14,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125170937] [2021-11-13 18:54:14,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125170937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:14,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148564477] [2021-11-13 18:54:14,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:54:14,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:14,748 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:14,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-11-13 18:54:14,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:54:14,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-13 18:54:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2415 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:15,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9385 backedges. 2415 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:15,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148564477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:15,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:15,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 75 [2021-11-13 18:54:15,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372012353] [2021-11-13 18:54:15,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:15,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-13 18:54:15,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:15,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-13 18:54:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2564, Invalid=2986, Unknown=0, NotChecked=0, Total=5550 [2021-11-13 18:54:15,977 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:17,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:17,614 INFO L93 Difference]: Finished difference Result 292 states and 293 transitions. [2021-11-13 18:54:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-11-13 18:54:17,614 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2021-11-13 18:54:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:17,615 INFO L225 Difference]: With dead ends: 292 [2021-11-13 18:54:17,615 INFO L226 Difference]: Without dead ends: 290 [2021-11-13 18:54:17,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 770 GetRequests, 624 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5311 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7818, Invalid=13352, Unknown=0, NotChecked=0, Total=21170 [2021-11-13 18:54:17,616 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 294 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.98ms SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 383.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:17,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 38 Invalid, 996 Unknown, 0 Unchecked, 1.98ms Time], IncrementalHoareTripleChecker [349 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 383.54ms Time] [2021-11-13 18:54:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-13 18:54:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 284. [2021-11-13 18:54:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.0070671378091873) internal successors, (285), 283 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 18:54:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 285 transitions. [2021-11-13 18:54:17,675 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 285 transitions. Word has length 280 [2021-11-13 18:54:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:17,675 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 285 transitions. [2021-11-13 18:54:17,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.7866666666666666) internal successors, (284), 75 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 285 transitions. [2021-11-13 18:54:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-13 18:54:17,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:17,676 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:17,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-11-13 18:54:17,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:17,877 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:17,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1480340685, now seen corresponding path program 137 times [2021-11-13 18:54:17,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:17,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121208206] [2021-11-13 18:54:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:17,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:22,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:22,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121208206] [2021-11-13 18:54:22,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121208206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:22,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178431975] [2021-11-13 18:54:22,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:54:22,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:22,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:22,731 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:22,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-11-13 18:54:23,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2021-11-13 18:54:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 142 conjunts are in the unsatisfiable core [2021-11-13 18:54:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:23,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 7176 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:24,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178431975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:24,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:24,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143, 143] total 144 [2021-11-13 18:54:24,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284879334] [2021-11-13 18:54:24,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:24,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2021-11-13 18:54:24,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-11-13 18:54:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5185, Invalid=15407, Unknown=0, NotChecked=0, Total=20592 [2021-11-13 18:54:24,068 INFO L87 Difference]: Start difference. First operand 284 states and 285 transitions. Second operand has 144 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 18:54:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:27,605 INFO L93 Difference]: Finished difference Result 499 states and 501 transitions. [2021-11-13 18:54:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-13 18:54:27,605 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 0 states have call successors, (0), 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 283 [2021-11-13 18:54:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:27,606 INFO L225 Difference]: With dead ends: 499 [2021-11-13 18:54:27,606 INFO L226 Difference]: Without dead ends: 285 [2021-11-13 18:54:27,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7590 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10439, Invalid=35571, Unknown=0, NotChecked=0, Total=46010 [2021-11-13 18:54:27,608 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 7 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 394.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 475.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:27,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 694 Invalid, 1407 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [9 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 475.30ms Time] [2021-11-13 18:54:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-13 18:54:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-11-13 18:54:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 18:54:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2021-11-13 18:54:27,667 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 283 [2021-11-13 18:54:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:27,667 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2021-11-13 18:54:27,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.9791666666666667) internal successors, (285), 144 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 18:54:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2021-11-13 18:54:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-13 18:54:27,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:27,668 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:27,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-11-13 18:54:27,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-11-13 18:54:27,869 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1991491464, now seen corresponding path program 138 times [2021-11-13 18:54:27,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:27,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029026680] [2021-11-13 18:54:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:27,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2415 proven. 7246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:29,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:29,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029026680] [2021-11-13 18:54:29,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029026680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:29,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126316910] [2021-11-13 18:54:29,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:54:29,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:29,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:29,770 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:29,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-11-13 18:54:30,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2021-11-13 18:54:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:30,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 143 conjunts are in the unsatisfiable core [2021-11-13 18:54:30,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2485 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:30,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9661 backedges. 2485 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:31,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126316910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:31,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:31,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 76 [2021-11-13 18:54:31,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573970839] [2021-11-13 18:54:31,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:31,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-13 18:54:31,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-13 18:54:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2636, Invalid=3064, Unknown=0, NotChecked=0, Total=5700 [2021-11-13 18:54:31,168 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 18:54:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:32,798 INFO L93 Difference]: Finished difference Result 296 states and 297 transitions. [2021-11-13 18:54:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-13 18:54:32,798 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 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 284 [2021-11-13 18:54:32,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:32,799 INFO L225 Difference]: With dead ends: 296 [2021-11-13 18:54:32,799 INFO L226 Difference]: Without dead ends: 294 [2021-11-13 18:54:32,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 633 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5458 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8036, Invalid=13720, Unknown=0, NotChecked=0, Total=21756 [2021-11-13 18:54:32,800 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 165 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 294.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 355.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:32,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 38 Invalid, 932 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [215 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 355.22ms Time] [2021-11-13 18:54:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-13 18:54:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 288. [2021-11-13 18:54:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.0069686411149825) internal successors, (289), 287 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2021-11-13 18:54:32,861 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 284 [2021-11-13 18:54:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:32,862 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2021-11-13 18:54:32,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.789473684210526) internal successors, (288), 76 states have internal predecessors, (288), 0 states have call successors, (0), 0 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 18:54:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2021-11-13 18:54:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-13 18:54:32,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:32,863 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:32,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-11-13 18:54:33,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-11-13 18:54:33,063 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2143764657, now seen corresponding path program 139 times [2021-11-13 18:54:33,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:33,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913133213] [2021-11-13 18:54:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:33,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:38,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:38,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913133213] [2021-11-13 18:54:38,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913133213] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:38,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130673740] [2021-11-13 18:54:38,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:54:38,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:38,059 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:38,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-11-13 18:54:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 144 conjunts are in the unsatisfiable core [2021-11-13 18:54:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:38,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 7385 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:39,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130673740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:39,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:39,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145, 145] total 146 [2021-11-13 18:54:39,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141606272] [2021-11-13 18:54:39,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:39,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2021-11-13 18:54:39,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2021-11-13 18:54:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5330, Invalid=15840, Unknown=0, NotChecked=0, Total=21170 [2021-11-13 18:54:39,237 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:42,681 INFO L93 Difference]: Finished difference Result 506 states and 508 transitions. [2021-11-13 18:54:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-11-13 18:54:42,681 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2021-11-13 18:54:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:42,682 INFO L225 Difference]: With dead ends: 506 [2021-11-13 18:54:42,682 INFO L226 Difference]: Without dead ends: 289 [2021-11-13 18:54:42,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7805 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=10730, Invalid=36576, Unknown=0, NotChecked=0, Total=47306 [2021-11-13 18:54:42,684 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 276.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 332.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:42,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 450 Invalid, 932 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [7 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 332.56ms Time] [2021-11-13 18:54:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-11-13 18:54:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-11-13 18:54:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 18:54:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2021-11-13 18:54:42,745 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 287 [2021-11-13 18:54:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:42,745 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2021-11-13 18:54:42,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.9794520547945205) internal successors, (289), 146 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2021-11-13 18:54:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-13 18:54:42,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:42,746 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:42,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-11-13 18:54:42,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:42,947 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash 766834156, now seen corresponding path program 140 times [2021-11-13 18:54:42,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:42,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747730642] [2021-11-13 18:54:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:42,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2485 proven. 7456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:45,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:45,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747730642] [2021-11-13 18:54:45,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747730642] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:45,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838166607] [2021-11-13 18:54:45,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:54:45,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:45,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:45,070 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:45,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-11-13 18:54:45,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:54:45,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 145 conjunts are in the unsatisfiable core [2021-11-13 18:54:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2556 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:45,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9941 backedges. 2556 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:46,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838166607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:46,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:46,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 77 [2021-11-13 18:54:46,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199486188] [2021-11-13 18:54:46,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:46,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-13 18:54:46,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:46,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-13 18:54:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2709, Invalid=3143, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 18:54:46,305 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 0 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 18:54:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:47,975 INFO L93 Difference]: Finished difference Result 300 states and 301 transitions. [2021-11-13 18:54:47,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-11-13 18:54:47,975 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 288 [2021-11-13 18:54:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:47,976 INFO L225 Difference]: With dead ends: 300 [2021-11-13 18:54:47,976 INFO L226 Difference]: Without dead ends: 298 [2021-11-13 18:54:47,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 642 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5607 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8257, Invalid=14093, Unknown=0, NotChecked=0, Total=22350 [2021-11-13 18:54:47,978 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 228 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 323.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 388.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:47,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 33 Invalid, 999 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [289 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 388.00ms Time] [2021-11-13 18:54:47,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-13 18:54:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 292. [2021-11-13 18:54:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.006872852233677) internal successors, (293), 291 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2021-11-13 18:54:48,039 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 288 [2021-11-13 18:54:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:48,039 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2021-11-13 18:54:48,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.792207792207792) internal successors, (292), 77 states have internal predecessors, (292), 0 states have call successors, (0), 0 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 18:54:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2021-11-13 18:54:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-13 18:54:48,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:48,040 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:48,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-11-13 18:54:48,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:48,241 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash -169885747, now seen corresponding path program 141 times [2021-11-13 18:54:48,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:48,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138815242] [2021-11-13 18:54:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:48,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:53,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:53,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138815242] [2021-11-13 18:54:53,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138815242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:53,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392955037] [2021-11-13 18:54:53,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:54:53,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:53,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:53,365 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:53,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-11-13 18:54:53,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2021-11-13 18:54:53,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:54:53,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 146 conjunts are in the unsatisfiable core [2021-11-13 18:54:53,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:54,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:54:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 7597 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:54:54,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392955037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:54:54,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:54:54,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147, 147] total 148 [2021-11-13 18:54:54,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828484920] [2021-11-13 18:54:54,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:54:54,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2021-11-13 18:54:54,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2021-11-13 18:54:54,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5477, Invalid=16279, Unknown=0, NotChecked=0, Total=21756 [2021-11-13 18:54:54,804 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand has 148 states, 148 states have (on average 1.9797297297297298) internal successors, (293), 148 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:54:58,485 INFO L93 Difference]: Finished difference Result 513 states and 515 transitions. [2021-11-13 18:54:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-11-13 18:54:58,486 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.9797297297297298) internal successors, (293), 148 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 291 [2021-11-13 18:54:58,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:58,486 INFO L225 Difference]: With dead ends: 513 [2021-11-13 18:54:58,486 INFO L226 Difference]: Without dead ends: 293 [2021-11-13 18:54:58,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8023 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=11025, Invalid=37595, Unknown=0, NotChecked=0, Total=48620 [2021-11-13 18:54:58,489 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 362.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.49ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 442.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:58,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 634 Invalid, 1301 Unknown, 0 Unchecked, 2.49ms Time], IncrementalHoareTripleChecker [8 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 442.18ms Time] [2021-11-13 18:54:58,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-13 18:54:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-11-13 18:54:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0068493150684932) internal successors, (294), 292 states have internal predecessors, (294), 0 states have call successors, (0), 0 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 18:54:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2021-11-13 18:54:58,550 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 291 [2021-11-13 18:54:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:58,550 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2021-11-13 18:54:58,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.9797297297297298) internal successors, (293), 148 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:54:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2021-11-13 18:54:58,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-11-13 18:54:58,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:58,552 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1, 1, 1] [2021-11-13 18:54:58,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:58,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-11-13 18:54:58,752 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash -550871160, now seen corresponding path program 142 times [2021-11-13 18:54:58,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:58,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933648177] [2021-11-13 18:54:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:58,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2556 proven. 7669 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:00,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:00,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933648177] [2021-11-13 18:55:00,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933648177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:00,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223255912] [2021-11-13 18:55:00,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:55:00,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:00,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:00,755 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:00,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-11-13 18:55:00,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:55:00,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:55:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 147 conjunts are in the unsatisfiable core [2021-11-13 18:55:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2628 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:01,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 10225 backedges. 2628 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:02,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223255912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:02,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:02,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76, 76] total 78 [2021-11-13 18:55:02,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012334368] [2021-11-13 18:55:02,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:02,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-13 18:55:02,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:02,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-13 18:55:02,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2783, Invalid=3223, Unknown=0, NotChecked=0, Total=6006 [2021-11-13 18:55:02,041 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 18:55:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:03,754 INFO L93 Difference]: Finished difference Result 304 states and 305 transitions. [2021-11-13 18:55:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-13 18:55:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 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 292 [2021-11-13 18:55:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:03,755 INFO L225 Difference]: With dead ends: 304 [2021-11-13 18:55:03,755 INFO L226 Difference]: Without dead ends: 302 [2021-11-13 18:55:03,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 651 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5758 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8481, Invalid=14471, Unknown=0, NotChecked=0, Total=22952 [2021-11-13 18:55:03,757 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 320.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.81ms SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 387.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:03,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 34 Invalid, 1039 Unknown, 0 Unchecked, 1.81ms Time], IncrementalHoareTripleChecker [221 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 387.32ms Time] [2021-11-13 18:55:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-13 18:55:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2021-11-13 18:55:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.006779661016949) internal successors, (297), 295 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 18:55:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 297 transitions. [2021-11-13 18:55:03,834 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 297 transitions. Word has length 292 [2021-11-13 18:55:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:03,835 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 297 transitions. [2021-11-13 18:55:03,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.7948717948717947) internal successors, (296), 78 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 18:55:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 297 transitions. [2021-11-13 18:55:03,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-11-13 18:55:03,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:03,836 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:03,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-11-13 18:55:04,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:04,036 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash 72130737, now seen corresponding path program 143 times [2021-11-13 18:55:04,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:04,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254293060] [2021-11-13 18:55:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:04,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:09,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:09,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254293060] [2021-11-13 18:55:09,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254293060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:09,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564933563] [2021-11-13 18:55:09,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:55:09,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:09,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:09,279 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:09,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-11-13 18:55:09,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2021-11-13 18:55:09,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:55:09,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 148 conjunts are in the unsatisfiable core [2021-11-13 18:55:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:10,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 7812 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:10,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564933563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:10,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:10,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149, 149] total 150 [2021-11-13 18:55:10,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826243300] [2021-11-13 18:55:10,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:10,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2021-11-13 18:55:10,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:10,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2021-11-13 18:55:10,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5626, Invalid=16724, Unknown=0, NotChecked=0, Total=22350 [2021-11-13 18:55:10,677 INFO L87 Difference]: Start difference. First operand 296 states and 297 transitions. Second operand has 150 states, 150 states have (on average 1.98) internal successors, (297), 150 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 18:55:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:14,590 INFO L93 Difference]: Finished difference Result 520 states and 522 transitions. [2021-11-13 18:55:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-11-13 18:55:14,591 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.98) internal successors, (297), 150 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2021-11-13 18:55:14,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:14,591 INFO L225 Difference]: With dead ends: 520 [2021-11-13 18:55:14,591 INFO L226 Difference]: Without dead ends: 297 [2021-11-13 18:55:14,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8244 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11324, Invalid=38628, Unknown=0, NotChecked=0, Total=49952 [2021-11-13 18:55:14,593 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 7 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 447.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.05ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 553.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:14,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 789 Invalid, 1614 Unknown, 0 Unchecked, 3.05ms Time], IncrementalHoareTripleChecker [8 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 553.05ms Time] [2021-11-13 18:55:14,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-13 18:55:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-11-13 18:55:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.0067567567567568) internal successors, (298), 296 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 18:55:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2021-11-13 18:55:14,657 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 295 [2021-11-13 18:55:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:14,657 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2021-11-13 18:55:14,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.98) internal successors, (297), 150 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 18:55:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2021-11-13 18:55:14,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-11-13 18:55:14,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:14,658 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:14,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-11-13 18:55:14,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:14,861 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash 58387180, now seen corresponding path program 144 times [2021-11-13 18:55:14,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:14,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526037914] [2021-11-13 18:55:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:14,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2628 proven. 7885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:16,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:16,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526037914] [2021-11-13 18:55:16,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526037914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:16,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719130181] [2021-11-13 18:55:16,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:55:16,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:16,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:16,912 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:16,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-11-13 18:55:17,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-11-13 18:55:17,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:55:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-13 18:55:17,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2701 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:17,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10513 backedges. 2701 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:18,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719130181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:18,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:18,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 79 [2021-11-13 18:55:18,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567027955] [2021-11-13 18:55:18,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:18,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-13 18:55:18,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-13 18:55:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=3304, Unknown=0, NotChecked=0, Total=6162 [2021-11-13 18:55:18,384 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:55:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:20,131 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2021-11-13 18:55:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-11-13 18:55:20,132 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 296 [2021-11-13 18:55:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:20,133 INFO L225 Difference]: With dead ends: 308 [2021-11-13 18:55:20,133 INFO L226 Difference]: Without dead ends: 306 [2021-11-13 18:55:20,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 660 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5911 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8708, Invalid=14854, Unknown=0, NotChecked=0, Total=23562 [2021-11-13 18:55:20,134 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 173 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 310.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 375.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:20,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 35 Invalid, 986 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [224 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 375.83ms Time] [2021-11-13 18:55:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-13 18:55:20,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 300. [2021-11-13 18:55:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.0066889632107023) internal successors, (301), 299 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:55:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 301 transitions. [2021-11-13 18:55:20,199 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 301 transitions. Word has length 296 [2021-11-13 18:55:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:20,199 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 301 transitions. [2021-11-13 18:55:20,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.7974683544303796) internal successors, (300), 79 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:55:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 301 transitions. [2021-11-13 18:55:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-13 18:55:20,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:20,200 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:20,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:20,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-11-13 18:55:20,401 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash -44455219, now seen corresponding path program 145 times [2021-11-13 18:55:20,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:20,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739781894] [2021-11-13 18:55:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:20,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:25,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:25,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739781894] [2021-11-13 18:55:25,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739781894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:25,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137664523] [2021-11-13 18:55:25,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:55:25,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:25,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:25,809 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:25,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-11-13 18:55:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:25,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 150 conjunts are in the unsatisfiable core [2021-11-13 18:55:25,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:26,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 8030 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:27,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137664523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:27,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:27,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151, 151] total 152 [2021-11-13 18:55:27,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236332110] [2021-11-13 18:55:27,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:27,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-11-13 18:55:27,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:27,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-11-13 18:55:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5777, Invalid=17175, Unknown=0, NotChecked=0, Total=22952 [2021-11-13 18:55:27,030 INFO L87 Difference]: Start difference. First operand 300 states and 301 transitions. Second operand has 152 states, 152 states have (on average 1.980263157894737) internal successors, (301), 152 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:55:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:30,914 INFO L93 Difference]: Finished difference Result 527 states and 529 transitions. [2021-11-13 18:55:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-13 18:55:30,914 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.980263157894737) internal successors, (301), 152 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 299 [2021-11-13 18:55:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:30,915 INFO L225 Difference]: With dead ends: 527 [2021-11-13 18:55:30,915 INFO L226 Difference]: Without dead ends: 301 [2021-11-13 18:55:30,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8468 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=11627, Invalid=39675, Unknown=0, NotChecked=0, Total=51302 [2021-11-13 18:55:30,917 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 7 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 377.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.60ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 453.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:30,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 634 Invalid, 1305 Unknown, 0 Unchecked, 2.60ms Time], IncrementalHoareTripleChecker [6 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 453.58ms Time] [2021-11-13 18:55:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-13 18:55:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-11-13 18:55:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0066666666666666) internal successors, (302), 300 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 18:55:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2021-11-13 18:55:30,982 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 299 [2021-11-13 18:55:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:30,983 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2021-11-13 18:55:30,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.980263157894737) internal successors, (301), 152 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:55:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2021-11-13 18:55:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-13 18:55:30,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:30,998 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:31,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-11-13 18:55:31,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-11-13 18:55:31,199 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash -879599736, now seen corresponding path program 146 times [2021-11-13 18:55:31,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:31,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844183754] [2021-11-13 18:55:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:31,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2701 proven. 8104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:33,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:33,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844183754] [2021-11-13 18:55:33,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844183754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:33,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288676791] [2021-11-13 18:55:33,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:55:33,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:33,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:33,293 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:33,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-11-13 18:55:33,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:55:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:55:33,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 151 conjunts are in the unsatisfiable core [2021-11-13 18:55:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2775 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:34,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10805 backedges. 2775 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:34,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288676791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:34,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:34,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 80 [2021-11-13 18:55:34,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001079918] [2021-11-13 18:55:34,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:34,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 18:55:34,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:34,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 18:55:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2934, Invalid=3386, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 18:55:34,584 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 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 18:55:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:36,402 INFO L93 Difference]: Finished difference Result 312 states and 313 transitions. [2021-11-13 18:55:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-11-13 18:55:36,403 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 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 300 [2021-11-13 18:55:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:36,403 INFO L225 Difference]: With dead ends: 312 [2021-11-13 18:55:36,403 INFO L226 Difference]: Without dead ends: 310 [2021-11-13 18:55:36,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 669 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8938, Invalid=15242, Unknown=0, NotChecked=0, Total=24180 [2021-11-13 18:55:36,405 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 310 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 337.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 408.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:36,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 35 Invalid, 1112 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [374 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 408.24ms Time] [2021-11-13 18:55:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-13 18:55:36,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 304. [2021-11-13 18:55:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.0066006600660067) internal successors, (305), 303 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 18:55:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2021-11-13 18:55:36,471 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 300 [2021-11-13 18:55:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:36,471 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2021-11-13 18:55:36,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.8) internal successors, (304), 80 states have internal predecessors, (304), 0 states have call successors, (0), 0 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 18:55:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2021-11-13 18:55:36,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-13 18:55:36,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:36,472 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:36,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-11-13 18:55:36,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-11-13 18:55:36,673 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:36,673 INFO L85 PathProgramCache]: Analyzing trace with hash -555441999, now seen corresponding path program 147 times [2021-11-13 18:55:36,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:36,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341187628] [2021-11-13 18:55:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:36,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:42,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:42,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341187628] [2021-11-13 18:55:42,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341187628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:42,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900724380] [2021-11-13 18:55:42,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:55:42,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:42,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:42,390 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:42,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-11-13 18:55:42,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2021-11-13 18:55:42,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:55:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 152 conjunts are in the unsatisfiable core [2021-11-13 18:55:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:43,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 8251 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:43,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900724380] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:43,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:43,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153, 153] total 154 [2021-11-13 18:55:43,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23170078] [2021-11-13 18:55:43,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:43,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-11-13 18:55:43,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:43,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-11-13 18:55:43,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5930, Invalid=17632, Unknown=0, NotChecked=0, Total=23562 [2021-11-13 18:55:43,901 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand has 154 states, 154 states have (on average 1.9805194805194806) internal successors, (305), 154 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 18:55:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:47,928 INFO L93 Difference]: Finished difference Result 534 states and 536 transitions. [2021-11-13 18:55:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-11-13 18:55:47,928 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.9805194805194806) internal successors, (305), 154 states have internal predecessors, (305), 0 states have call successors, (0), 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 303 [2021-11-13 18:55:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:47,929 INFO L225 Difference]: With dead ends: 534 [2021-11-13 18:55:47,929 INFO L226 Difference]: Without dead ends: 305 [2021-11-13 18:55:47,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8695 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=11934, Invalid=40736, Unknown=0, NotChecked=0, Total=52670 [2021-11-13 18:55:47,931 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 7 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 413.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 501.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:47,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 755 Invalid, 1537 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [7 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 501.58ms Time] [2021-11-13 18:55:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-13 18:55:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-11-13 18:55:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.006578947368421) internal successors, (306), 304 states have internal predecessors, (306), 0 states have call successors, (0), 0 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 18:55:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2021-11-13 18:55:47,999 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 303 [2021-11-13 18:55:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:47,999 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2021-11-13 18:55:47,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.9805194805194806) internal successors, (305), 154 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 18:55:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2021-11-13 18:55:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-11-13 18:55:48,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:48,001 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:48,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-11-13 18:55:48,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-11-13 18:55:48,229 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:48,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1007779860, now seen corresponding path program 148 times [2021-11-13 18:55:48,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:48,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708972907] [2021-11-13 18:55:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:48,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2775 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:50,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:50,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708972907] [2021-11-13 18:55:50,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708972907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:50,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633961622] [2021-11-13 18:55:50,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:55:50,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:50,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:50,392 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:50,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-11-13 18:55:50,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:55:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:55:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 153 conjunts are in the unsatisfiable core [2021-11-13 18:55:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2850 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:51,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11101 backedges. 2850 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:51,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633961622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:51,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:51,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 81 [2021-11-13 18:55:51,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262149693] [2021-11-13 18:55:51,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:51,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-13 18:55:51,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-13 18:55:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3011, Invalid=3469, Unknown=0, NotChecked=0, Total=6480 [2021-11-13 18:55:51,728 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 18:55:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:53,588 INFO L93 Difference]: Finished difference Result 316 states and 317 transitions. [2021-11-13 18:55:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-11-13 18:55:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-11-13 18:55:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:53,589 INFO L225 Difference]: With dead ends: 316 [2021-11-13 18:55:53,589 INFO L226 Difference]: Without dead ends: 314 [2021-11-13 18:55:53,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 678 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6223 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9171, Invalid=15635, Unknown=0, NotChecked=0, Total=24806 [2021-11-13 18:55:53,590 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 238 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 336.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 406.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:53,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 30 Invalid, 1086 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [305 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 406.60ms Time] [2021-11-13 18:55:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-13 18:55:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 308. [2021-11-13 18:55:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.006514657980456) internal successors, (309), 307 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 18:55:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 309 transitions. [2021-11-13 18:55:53,658 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 309 transitions. Word has length 304 [2021-11-13 18:55:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:53,659 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 309 transitions. [2021-11-13 18:55:53,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.802469135802469) internal successors, (308), 81 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 18:55:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 309 transitions. [2021-11-13 18:55:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-11-13 18:55:53,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:53,660 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:53,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:53,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-11-13 18:55:53,860 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:55:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash -943589939, now seen corresponding path program 149 times [2021-11-13 18:55:53,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:53,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844043281] [2021-11-13 18:55:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:53,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:59,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:59,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844043281] [2021-11-13 18:55:59,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844043281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:59,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435286314] [2021-11-13 18:55:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:55:59,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:59,544 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:59,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-11-13 18:55:59,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2021-11-13 18:55:59,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:55:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-13 18:55:59,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:00,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 8475 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:01,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435286314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:01,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:01,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155, 155] total 156 [2021-11-13 18:56:01,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177651488] [2021-11-13 18:56:01,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:01,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2021-11-13 18:56:01,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-11-13 18:56:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6085, Invalid=18095, Unknown=0, NotChecked=0, Total=24180 [2021-11-13 18:56:01,051 INFO L87 Difference]: Start difference. First operand 308 states and 309 transitions. Second operand has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 18:56:04,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:04,983 INFO L93 Difference]: Finished difference Result 541 states and 543 transitions. [2021-11-13 18:56:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-11-13 18:56:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 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 307 [2021-11-13 18:56:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:04,984 INFO L225 Difference]: With dead ends: 541 [2021-11-13 18:56:04,984 INFO L226 Difference]: Without dead ends: 309 [2021-11-13 18:56:04,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8925 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=12245, Invalid=41811, Unknown=0, NotChecked=0, Total=54056 [2021-11-13 18:56:04,986 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 7 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 384.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:04,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 532 Invalid, 1103 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [10 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 384.45ms Time] [2021-11-13 18:56:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-13 18:56:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-11-13 18:56:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.0064935064935066) internal successors, (310), 308 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 18:56:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2021-11-13 18:56:05,055 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 307 [2021-11-13 18:56:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:05,055 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2021-11-13 18:56:05,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.9807692307692308) internal successors, (309), 156 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 18:56:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2021-11-13 18:56:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-13 18:56:05,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:05,056 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:05,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:05,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:05,257 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:56:05,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:05,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1241759624, now seen corresponding path program 150 times [2021-11-13 18:56:05,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:05,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229042028] [2021-11-13 18:56:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:05,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2850 proven. 8551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:07,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:07,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229042028] [2021-11-13 18:56:07,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229042028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:07,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359490188] [2021-11-13 18:56:07,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:56:07,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:07,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:07,470 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:07,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-11-13 18:56:07,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2021-11-13 18:56:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:07,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 155 conjunts are in the unsatisfiable core [2021-11-13 18:56:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2926 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:08,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11401 backedges. 2926 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:09,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359490188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:09,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:09,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 82 [2021-11-13 18:56:09,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555179382] [2021-11-13 18:56:09,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:09,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-13 18:56:09,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:09,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-13 18:56:09,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3089, Invalid=3553, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 18:56:09,031 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 18:56:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:10,904 INFO L93 Difference]: Finished difference Result 320 states and 321 transitions. [2021-11-13 18:56:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-11-13 18:56:10,904 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 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 308 [2021-11-13 18:56:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:10,905 INFO L225 Difference]: With dead ends: 320 [2021-11-13 18:56:10,905 INFO L226 Difference]: Without dead ends: 318 [2021-11-13 18:56:10,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 687 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6382 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9407, Invalid=16033, Unknown=0, NotChecked=0, Total=25440 [2021-11-13 18:56:10,907 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 247 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 325.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 393.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:10,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 32 Invalid, 1037 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [309 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 393.22ms Time] [2021-11-13 18:56:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-13 18:56:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 312. [2021-11-13 18:56:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.0064308681672025) internal successors, (313), 311 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 18:56:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 313 transitions. [2021-11-13 18:56:10,977 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 313 transitions. Word has length 308 [2021-11-13 18:56:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:10,977 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 313 transitions. [2021-11-13 18:56:10,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 18:56:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 313 transitions. [2021-11-13 18:56:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-13 18:56:10,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:10,979 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:10,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-11-13 18:56:11,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:11,179 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:56:11,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:11,180 INFO L85 PathProgramCache]: Analyzing trace with hash 712458417, now seen corresponding path program 151 times [2021-11-13 18:56:11,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:11,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679945868] [2021-11-13 18:56:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:11,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:17,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:17,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679945868] [2021-11-13 18:56:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679945868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:17,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245754838] [2021-11-13 18:56:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:56:17,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:17,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:17,011 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:17,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-11-13 18:56:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:17,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 156 conjunts are in the unsatisfiable core [2021-11-13 18:56:17,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:17,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 8702 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:18,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245754838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:18,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:18,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157, 157] total 158 [2021-11-13 18:56:18,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941500944] [2021-11-13 18:56:18,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:18,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-11-13 18:56:18,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-11-13 18:56:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6242, Invalid=18564, Unknown=0, NotChecked=0, Total=24806 [2021-11-13 18:56:18,289 INFO L87 Difference]: Start difference. First operand 312 states and 313 transitions. Second operand has 158 states, 158 states have (on average 1.981012658227848) internal successors, (313), 158 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 18:56:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:22,378 INFO L93 Difference]: Finished difference Result 548 states and 550 transitions. [2021-11-13 18:56:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-11-13 18:56:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.981012658227848) internal successors, (313), 158 states have internal predecessors, (313), 0 states have call successors, (0), 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 18:56:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:22,379 INFO L225 Difference]: With dead ends: 548 [2021-11-13 18:56:22,379 INFO L226 Difference]: Without dead ends: 313 [2021-11-13 18:56:22,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9158 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=12560, Invalid=42900, Unknown=0, NotChecked=0, Total=55460 [2021-11-13 18:56:22,382 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 7 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 361.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 432.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:22,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 582 Invalid, 1200 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [9 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 432.75ms Time] [2021-11-13 18:56:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-13 18:56:22,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-11-13 18:56:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.0064102564102564) internal successors, (314), 312 states have internal predecessors, (314), 0 states have call successors, (0), 0 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 18:56:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2021-11-13 18:56:22,452 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 311 [2021-11-13 18:56:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:22,452 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2021-11-13 18:56:22,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.981012658227848) internal successors, (313), 158 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 18:56:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2021-11-13 18:56:22,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-13 18:56:22,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:22,454 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:22,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-11-13 18:56:22,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:22,654 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:56:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1091062548, now seen corresponding path program 152 times [2021-11-13 18:56:22,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:22,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324336732] [2021-11-13 18:56:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:22,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 2926 proven. 8779 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:24,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:24,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324336732] [2021-11-13 18:56:24,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324336732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:24,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69539665] [2021-11-13 18:56:24,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:56:24,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:24,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:24,923 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:24,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-11-13 18:56:25,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:56:25,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:25,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-13 18:56:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3003 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:25,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11705 backedges. 3003 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:26,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69539665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:26,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:26,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 83 [2021-11-13 18:56:26,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595864286] [2021-11-13 18:56:26,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:26,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-13 18:56:26,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-13 18:56:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3168, Invalid=3638, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 18:56:26,267 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 18:56:28,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:28,212 INFO L93 Difference]: Finished difference Result 324 states and 325 transitions. [2021-11-13 18:56:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-11-13 18:56:28,213 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 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 312 [2021-11-13 18:56:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:28,213 INFO L225 Difference]: With dead ends: 324 [2021-11-13 18:56:28,213 INFO L226 Difference]: Without dead ends: 322 [2021-11-13 18:56:28,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 696 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6543 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9646, Invalid=16436, Unknown=0, NotChecked=0, Total=26082 [2021-11-13 18:56:28,215 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 326 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 361.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 437.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:28,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 28 Invalid, 1202 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [389 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 437.46ms Time] [2021-11-13 18:56:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-13 18:56:28,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 316. [2021-11-13 18:56:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0063492063492063) internal successors, (317), 315 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 18:56:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2021-11-13 18:56:28,287 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 312 [2021-11-13 18:56:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:28,287 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2021-11-13 18:56:28,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.8072289156626504) internal successors, (316), 83 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 18:56:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2021-11-13 18:56:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-13 18:56:28,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:28,288 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:28,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:28,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:28,489 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:56:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash 472948941, now seen corresponding path program 153 times [2021-11-13 18:56:28,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:28,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747128282] [2021-11-13 18:56:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:28,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 8932 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:34,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:34,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747128282] [2021-11-13 18:56:34,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747128282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:34,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384239377] [2021-11-13 18:56:34,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:56:34,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:34,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:34,689 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:34,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-11-13 18:56:35,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2021-11-13 18:56:35,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 158 conjunts are in the unsatisfiable core [2021-11-13 18:56:35,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 8932 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:35,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 8932 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:36,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384239377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:36,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:36,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159, 159] total 160 [2021-11-13 18:56:36,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908847768] [2021-11-13 18:56:36,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:36,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2021-11-13 18:56:36,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:36,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2021-11-13 18:56:36,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6401, Invalid=19039, Unknown=0, NotChecked=0, Total=25440 [2021-11-13 18:56:36,308 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand has 160 states, 160 states have (on average 1.98125) internal successors, (317), 160 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 18:56:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:40,544 INFO L93 Difference]: Finished difference Result 555 states and 557 transitions. [2021-11-13 18:56:40,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-11-13 18:56:40,544 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.98125) internal successors, (317), 160 states have internal predecessors, (317), 0 states have call successors, (0), 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 315 [2021-11-13 18:56:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:40,544 INFO L225 Difference]: With dead ends: 555 [2021-11-13 18:56:40,544 INFO L226 Difference]: Without dead ends: 317 [2021-11-13 18:56:40,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9394 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=12879, Invalid=44003, Unknown=0, NotChecked=0, Total=56882 [2021-11-13 18:56:40,547 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 7 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 387.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 465.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:40,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 637 Invalid, 1329 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [13 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 465.58ms Time] [2021-11-13 18:56:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-11-13 18:56:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2021-11-13 18:56:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.0063291139240507) internal successors, (318), 316 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:56:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2021-11-13 18:56:40,619 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 315 [2021-11-13 18:56:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:40,619 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2021-11-13 18:56:40,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.98125) internal successors, (317), 160 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 18:56:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2021-11-13 18:56:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-13 18:56:40,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:40,621 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:40,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:40,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:40,821 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:56:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash -694780024, now seen corresponding path program 154 times [2021-11-13 18:56:40,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:40,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143803588] [2021-11-13 18:56:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:40,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12013 backedges. 3003 proven. 9010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:43,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:43,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143803588] [2021-11-13 18:56:43,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143803588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:43,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621274882] [2021-11-13 18:56:43,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:56:43,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:43,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:43,145 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:43,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-11-13 18:56:43,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:56:43,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:43,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 159 conjunts are in the unsatisfiable core [2021-11-13 18:56:43,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12013 backedges. 3081 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:43,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12013 backedges. 3081 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:44,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621274882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:44,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:44,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 84 [2021-11-13 18:56:44,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228441809] [2021-11-13 18:56:44,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:44,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-13 18:56:44,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:44,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-13 18:56:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3248, Invalid=3724, Unknown=0, NotChecked=0, Total=6972 [2021-11-13 18:56:44,527 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand has 84 states, 84 states have (on average 3.8095238095238093) internal successors, (320), 84 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:56:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:46,490 INFO L93 Difference]: Finished difference Result 328 states and 329 transitions. [2021-11-13 18:56:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-11-13 18:56:46,491 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.8095238095238093) internal successors, (320), 84 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 316 [2021-11-13 18:56:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:46,491 INFO L225 Difference]: With dead ends: 328 [2021-11-13 18:56:46,491 INFO L226 Difference]: Without dead ends: 326 [2021-11-13 18:56:46,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 705 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9888, Invalid=16844, Unknown=0, NotChecked=0, Total=26732 [2021-11-13 18:56:46,493 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 253 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 345.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 417.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:46,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 29 Invalid, 1116 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [317 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 417.56ms Time] [2021-11-13 18:56:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-13 18:56:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 320. [2021-11-13 18:56:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.006269592476489) internal successors, (321), 319 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 18:56:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 321 transitions. [2021-11-13 18:56:46,566 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 321 transitions. Word has length 316 [2021-11-13 18:56:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:46,567 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 321 transitions. [2021-11-13 18:56:46,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.8095238095238093) internal successors, (320), 84 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:56:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 321 transitions. [2021-11-13 18:56:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-13 18:56:46,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:46,568 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:46,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-11-13 18:56:46,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-11-13 18:56:46,769 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:56:46,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:46,769 INFO L85 PathProgramCache]: Analyzing trace with hash -739475279, now seen corresponding path program 155 times [2021-11-13 18:56:46,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:46,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815779101] [2021-11-13 18:56:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:46,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 9165 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:52,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:52,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815779101] [2021-11-13 18:56:52,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815779101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:52,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215570857] [2021-11-13 18:56:52,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:56:52,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:52,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:52,896 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:52,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-11-13 18:56:53,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2021-11-13 18:56:53,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:53,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 160 conjunts are in the unsatisfiable core [2021-11-13 18:56:53,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 9165 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:53,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 9165 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:56:54,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215570857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:54,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:54,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161, 161] total 162 [2021-11-13 18:56:54,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235461349] [2021-11-13 18:56:54,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:54,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2021-11-13 18:56:54,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:54,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2021-11-13 18:56:54,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6562, Invalid=19520, Unknown=0, NotChecked=0, Total=26082 [2021-11-13 18:56:54,415 INFO L87 Difference]: Start difference. First operand 320 states and 321 transitions. Second operand has 162 states, 162 states have (on average 1.9814814814814814) internal successors, (321), 162 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 18:56:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:58,617 INFO L93 Difference]: Finished difference Result 562 states and 564 transitions. [2021-11-13 18:56:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-11-13 18:56:58,617 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.9814814814814814) internal successors, (321), 162 states have internal predecessors, (321), 0 states have call successors, (0), 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 319 [2021-11-13 18:56:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:58,618 INFO L225 Difference]: With dead ends: 562 [2021-11-13 18:56:58,618 INFO L226 Difference]: Without dead ends: 321 [2021-11-13 18:56:58,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9633 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=13202, Invalid=45120, Unknown=0, NotChecked=0, Total=58322 [2021-11-13 18:56:58,620 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 7 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 321.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 387.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:58,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 530 Invalid, 1105 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [9 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 387.64ms Time] [2021-11-13 18:56:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-13 18:56:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2021-11-13 18:56:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.00625) internal successors, (322), 320 states have internal predecessors, (322), 0 states have call successors, (0), 0 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 18:56:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 322 transitions. [2021-11-13 18:56:58,694 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 322 transitions. Word has length 319 [2021-11-13 18:56:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:58,694 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 322 transitions. [2021-11-13 18:56:58,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.9814814814814814) internal successors, (321), 162 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 18:56:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 322 transitions. [2021-11-13 18:56:58,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-13 18:56:58,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:58,696 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:58,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-11-13 18:56:58,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-11-13 18:56:58,896 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:56:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:58,897 INFO L85 PathProgramCache]: Analyzing trace with hash 377391596, now seen corresponding path program 156 times [2021-11-13 18:56:58,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:58,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156115955] [2021-11-13 18:56:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:58,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:57:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12325 backedges. 3081 proven. 9244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:01,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:57:01,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156115955] [2021-11-13 18:57:01,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156115955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:57:01,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513963983] [2021-11-13 18:57:01,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:57:01,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:57:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:57:01,281 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:57:01,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-11-13 18:57:01,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-11-13 18:57:01,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:57:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 161 conjunts are in the unsatisfiable core [2021-11-13 18:57:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:57:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12325 backedges. 3160 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:02,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:57:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12325 backedges. 3160 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:02,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513963983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:57:02,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:57:02,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 85 [2021-11-13 18:57:02,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699882797] [2021-11-13 18:57:02,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:57:02,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-13 18:57:02,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:57:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-13 18:57:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3329, Invalid=3811, Unknown=0, NotChecked=0, Total=7140 [2021-11-13 18:57:02,902 INFO L87 Difference]: Start difference. First operand 321 states and 322 transitions. Second operand has 85 states, 85 states have (on average 3.8117647058823527) internal successors, (324), 85 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 18:57:04,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:57:04,909 INFO L93 Difference]: Finished difference Result 332 states and 333 transitions. [2021-11-13 18:57:04,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-11-13 18:57:04,909 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.8117647058823527) internal successors, (324), 85 states have internal predecessors, (324), 0 states have call successors, (0), 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 320 [2021-11-13 18:57:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:57:04,910 INFO L225 Difference]: With dead ends: 332 [2021-11-13 18:57:04,910 INFO L226 Difference]: Without dead ends: 330 [2021-11-13 18:57:04,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 714 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6871 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10133, Invalid=17257, Unknown=0, NotChecked=0, Total=27390 [2021-11-13 18:57:04,912 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 248 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 354.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 428.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:57:04,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 36 Invalid, 1152 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [321 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 428.20ms Time] [2021-11-13 18:57:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-13 18:57:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2021-11-13 18:57:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.0061919504643964) internal successors, (325), 323 states have internal predecessors, (325), 0 states have call successors, (0), 0 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 18:57:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 325 transitions. [2021-11-13 18:57:04,987 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 325 transitions. Word has length 320 [2021-11-13 18:57:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:57:04,987 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 325 transitions. [2021-11-13 18:57:04,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.8117647058823527) internal successors, (324), 85 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 18:57:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 325 transitions. [2021-11-13 18:57:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-13 18:57:04,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:57:04,988 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2021-11-13 18:57:05,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-11-13 18:57:05,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-11-13 18:57:05,189 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:57:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:57:05,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1346524211, now seen corresponding path program 157 times [2021-11-13 18:57:05,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:57:05,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997954215] [2021-11-13 18:57:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:57:05,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:57:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:57:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 9401 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:11,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:57:11,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997954215] [2021-11-13 18:57:11,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997954215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:57:11,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674643715] [2021-11-13 18:57:11,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:57:11,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:57:11,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:57:11,485 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:57:11,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-11-13 18:57:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:57:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 162 conjunts are in the unsatisfiable core [2021-11-13 18:57:11,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:57:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 9401 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:12,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:57:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 9401 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:12,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674643715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:57:12,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:57:12,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163, 163] total 164 [2021-11-13 18:57:12,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704149459] [2021-11-13 18:57:12,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:57:12,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2021-11-13 18:57:12,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:57:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2021-11-13 18:57:12,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6725, Invalid=20007, Unknown=0, NotChecked=0, Total=26732 [2021-11-13 18:57:12,806 INFO L87 Difference]: Start difference. First operand 324 states and 325 transitions. Second operand has 164 states, 164 states have (on average 1.9817073170731707) internal successors, (325), 164 states have internal predecessors, (325), 0 states have call successors, (0), 0 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 18:57:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:57:17,344 INFO L93 Difference]: Finished difference Result 569 states and 571 transitions. [2021-11-13 18:57:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-11-13 18:57:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 1.9817073170731707) internal successors, (325), 164 states have internal predecessors, (325), 0 states have call successors, (0), 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 323 [2021-11-13 18:57:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:57:17,345 INFO L225 Difference]: With dead ends: 569 [2021-11-13 18:57:17,345 INFO L226 Difference]: Without dead ends: 325 [2021-11-13 18:57:17,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9875 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13529, Invalid=46251, Unknown=0, NotChecked=0, Total=59780 [2021-11-13 18:57:17,347 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 7 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.89ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 528.67ms IncrementalHoareTripleChecker+Time [2021-11-13 18:57:17,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 780 Invalid, 1609 Unknown, 0 Unchecked, 15.89ms Time], IncrementalHoareTripleChecker [9 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 528.67ms Time] [2021-11-13 18:57:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-13 18:57:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-11-13 18:57:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0061728395061729) internal successors, (326), 324 states have internal predecessors, (326), 0 states have call successors, (0), 0 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 18:57:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2021-11-13 18:57:17,423 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 323 [2021-11-13 18:57:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:57:17,423 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2021-11-13 18:57:17,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 1.9817073170731707) internal successors, (325), 164 states have internal predecessors, (325), 0 states have call successors, (0), 0 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 18:57:17,424 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2021-11-13 18:57:17,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-13 18:57:17,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:57:17,425 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1, 1, 1] [2021-11-13 18:57:17,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-11-13 18:57:17,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-11-13 18:57:17,625 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:57:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:57:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash -614293624, now seen corresponding path program 158 times [2021-11-13 18:57:17,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:57:17,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287456571] [2021-11-13 18:57:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:57:17,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:57:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:57:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12641 backedges. 3160 proven. 9481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:20,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:57:20,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287456571] [2021-11-13 18:57:20,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287456571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:57:20,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578989535] [2021-11-13 18:57:20,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:57:20,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:57:20,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:57:20,075 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:57:20,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-11-13 18:57:20,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:57:20,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:57:20,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 163 conjunts are in the unsatisfiable core [2021-11-13 18:57:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:57:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12641 backedges. 3240 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:20,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:57:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12641 backedges. 3240 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:21,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578989535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:57:21,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:57:21,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84, 84] total 86 [2021-11-13 18:57:21,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554294317] [2021-11-13 18:57:21,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:57:21,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-13 18:57:21,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:57:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-13 18:57:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3411, Invalid=3899, Unknown=0, NotChecked=0, Total=7310 [2021-11-13 18:57:21,480 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand has 86 states, 86 states have (on average 3.813953488372093) internal successors, (328), 86 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 18:57:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:57:23,529 INFO L93 Difference]: Finished difference Result 336 states and 337 transitions. [2021-11-13 18:57:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-11-13 18:57:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.813953488372093) internal successors, (328), 86 states have internal predecessors, (328), 0 states have call successors, (0), 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 324 [2021-11-13 18:57:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:57:23,530 INFO L225 Difference]: With dead ends: 336 [2021-11-13 18:57:23,530 INFO L226 Difference]: Without dead ends: 334 [2021-11-13 18:57:23,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 723 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7038 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10381, Invalid=17675, Unknown=0, NotChecked=0, Total=28056 [2021-11-13 18:57:23,531 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 262 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 360.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 435.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:57:23,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 36 Invalid, 1178 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [324 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 435.48ms Time] [2021-11-13 18:57:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-13 18:57:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 328. [2021-11-13 18:57:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0061162079510704) internal successors, (329), 327 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 18:57:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 329 transitions. [2021-11-13 18:57:23,608 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 329 transitions. Word has length 324 [2021-11-13 18:57:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:57:23,608 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 329 transitions. [2021-11-13 18:57:23,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.813953488372093) internal successors, (328), 86 states have internal predecessors, (328), 0 states have call successors, (0), 0 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 18:57:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 329 transitions. [2021-11-13 18:57:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-13 18:57:23,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:57:23,610 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2021-11-13 18:57:23,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-11-13 18:57:23,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:57:23,810 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:57:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:57:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash 439115953, now seen corresponding path program 159 times [2021-11-13 18:57:23,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:57:23,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46226871] [2021-11-13 18:57:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:57:23,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:57:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:57:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 9640 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:30,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:57:30,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46226871] [2021-11-13 18:57:30,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46226871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:57:30,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702038274] [2021-11-13 18:57:30,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:57:30,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:57:30,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:57:30,230 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:57:30,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-11-13 18:57:30,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2021-11-13 18:57:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:57:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 164 conjunts are in the unsatisfiable core [2021-11-13 18:57:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:57:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 9640 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:31,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:57:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 9640 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:31,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702038274] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:57:31,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:57:31,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165, 165] total 166 [2021-11-13 18:57:31,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635895896] [2021-11-13 18:57:31,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:57:31,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2021-11-13 18:57:31,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:57:31,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-11-13 18:57:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6890, Invalid=20500, Unknown=0, NotChecked=0, Total=27390 [2021-11-13 18:57:31,889 INFO L87 Difference]: Start difference. First operand 328 states and 329 transitions. Second operand has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 18:57:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:57:36,864 INFO L93 Difference]: Finished difference Result 576 states and 578 transitions. [2021-11-13 18:57:36,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-11-13 18:57:36,864 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 0 states have call successors, (0), 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 327 [2021-11-13 18:57:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:57:36,865 INFO L225 Difference]: With dead ends: 576 [2021-11-13 18:57:36,865 INFO L226 Difference]: Without dead ends: 329 [2021-11-13 18:57:36,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10120 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=13860, Invalid=47396, Unknown=0, NotChecked=0, Total=61256 [2021-11-13 18:57:36,868 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 7 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 640.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.28ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 776.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:57:36,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1220 Invalid, 2452 Unknown, 0 Unchecked, 4.28ms Time], IncrementalHoareTripleChecker [7 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 776.70ms Time] [2021-11-13 18:57:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-13 18:57:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-11-13 18:57:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.0060975609756098) internal successors, (330), 328 states have internal predecessors, (330), 0 states have call successors, (0), 0 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 18:57:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 330 transitions. [2021-11-13 18:57:36,946 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 330 transitions. Word has length 327 [2021-11-13 18:57:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:57:36,946 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 330 transitions. [2021-11-13 18:57:36,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.9819277108433735) internal successors, (329), 166 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 18:57:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 330 transitions. [2021-11-13 18:57:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-13 18:57:36,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:57:36,947 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1, 1, 1] [2021-11-13 18:57:36,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-11-13 18:57:37,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:57:37,148 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:57:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:57:37,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1047199468, now seen corresponding path program 160 times [2021-11-13 18:57:37,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:57:37,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941908130] [2021-11-13 18:57:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:57:37,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:57:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:57:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12961 backedges. 3240 proven. 9721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:39,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:57:39,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941908130] [2021-11-13 18:57:39,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941908130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:57:39,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133180701] [2021-11-13 18:57:39,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:57:39,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:57:39,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:57:39,782 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:57:39,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-11-13 18:57:39,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:57:39,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:57:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 165 conjunts are in the unsatisfiable core [2021-11-13 18:57:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:57:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12961 backedges. 3321 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:40,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:57:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12961 backedges. 3321 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:41,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133180701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:57:41,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:57:41,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 87 [2021-11-13 18:57:41,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480396078] [2021-11-13 18:57:41,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:57:41,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-13 18:57:41,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:57:41,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-13 18:57:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3494, Invalid=3988, Unknown=0, NotChecked=0, Total=7482 [2021-11-13 18:57:41,223 INFO L87 Difference]: Start difference. First operand 329 states and 330 transitions. Second operand has 87 states, 87 states have (on average 3.8160919540229883) internal successors, (332), 87 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:57:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:57:43,360 INFO L93 Difference]: Finished difference Result 340 states and 341 transitions. [2021-11-13 18:57:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-11-13 18:57:43,361 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.8160919540229883) internal successors, (332), 87 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2021-11-13 18:57:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:57:43,361 INFO L225 Difference]: With dead ends: 340 [2021-11-13 18:57:43,361 INFO L226 Difference]: Without dead ends: 338 [2021-11-13 18:57:43,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 732 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=10632, Invalid=18098, Unknown=0, NotChecked=0, Total=28730 [2021-11-13 18:57:43,363 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 173 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 375.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 452.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:57:43,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 35 Invalid, 1133 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [248 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 452.84ms Time] [2021-11-13 18:57:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-13 18:57:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 332. [2021-11-13 18:57:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.0060422960725075) internal successors, (333), 331 states have internal predecessors, (333), 0 states have call successors, (0), 0 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 18:57:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 333 transitions. [2021-11-13 18:57:43,443 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 333 transitions. Word has length 328 [2021-11-13 18:57:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:57:43,443 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 333 transitions. [2021-11-13 18:57:43,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.8160919540229883) internal successors, (332), 87 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:57:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 333 transitions. [2021-11-13 18:57:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-11-13 18:57:43,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:57:43,444 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2021-11-13 18:57:43,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-11-13 18:57:43,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-11-13 18:57:43,645 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:57:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:57:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1518266675, now seen corresponding path program 161 times [2021-11-13 18:57:43,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:57:43,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021500056] [2021-11-13 18:57:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:57:43,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:57:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:57:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 9882 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:50,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:57:50,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021500056] [2021-11-13 18:57:50,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021500056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:57:50,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174268867] [2021-11-13 18:57:50,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:57:50,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:57:50,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:57:50,275 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:57:50,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1da7ca34-46e3-4d92-b66a-952ae2a6ee5f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-11-13 18:57:50,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2021-11-13 18:57:50,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:57:50,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 166 conjunts are in the unsatisfiable core [2021-11-13 18:57:50,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:57:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 9882 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:51,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:57:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 9882 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:57:51,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174268867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:57:51,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:57:51,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167, 167] total 168 [2021-11-13 18:57:51,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705748271] [2021-11-13 18:57:51,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:57:51,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2021-11-13 18:57:51,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:57:51,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2021-11-13 18:57:51,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7057, Invalid=20999, Unknown=0, NotChecked=0, Total=28056 [2021-11-13 18:57:51,932 INFO L87 Difference]: Start difference. First operand 332 states and 333 transitions. Second operand has 168 states, 168 states have (on average 1.9821428571428572) internal successors, (333), 168 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)