./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G --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 b7385fd88a67a4d51b868c33a4a2a17411348aca1f3bf817148857f9693eef2c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:22:39,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:22:39,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:22:39,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:22:39,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:22:39,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:22:39,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:22:39,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:22:39,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:22:39,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:22:39,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:22:39,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:22:39,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:22:39,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:22:39,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:22:39,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:22:39,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:22:39,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:22:39,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:22:39,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:22:39,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:22:39,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:22:39,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:22:39,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:22:39,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:22:39,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:22:39,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:22:39,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:22:39,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:22:39,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:22:39,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:22:39,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:22:39,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:22:39,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:22:39,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:22:39,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:22:39,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:22:39,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:22:39,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:22:39,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:22:39,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:22:39,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:22:39,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:22:39,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:22:39,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:22:39,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:22:39,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:22:39,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:22:39,884 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:22:39,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:22:39,884 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:22:39,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:22:39,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:22:39,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:22:39,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:22:39,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:22:39,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:22:39,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:22:39,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:22:39,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:22:39,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:22:39,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:22:39,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:22:39,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:22:39,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:22:39,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:22:39,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:22:39,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:22:39,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:22:39,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:22:39,890 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:22:39,891 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:22:39,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:22:39,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:22:39,892 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_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7385fd88a67a4d51b868c33a4a2a17411348aca1f3bf817148857f9693eef2c [2021-11-23 12:22:40,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:22:40,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:22:40,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:22:40,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:22:40,216 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:22:40,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/eca-rers2012/Problem13_label13.c [2021-11-23 12:22:40,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/data/ed2484d81/05f65b5394884d69b581559133e2768a/FLAG923bd8c53 [2021-11-23 12:22:41,097 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:22:41,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/sv-benchmarks/c/eca-rers2012/Problem13_label13.c [2021-11-23 12:22:41,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/data/ed2484d81/05f65b5394884d69b581559133e2768a/FLAG923bd8c53 [2021-11-23 12:22:41,254 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/data/ed2484d81/05f65b5394884d69b581559133e2768a [2021-11-23 12:22:41,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:22:41,259 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:22:41,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:22:41,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:22:41,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:22:41,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:22:41" (1/1) ... [2021-11-23 12:22:41,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c4e9cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:41, skipping insertion in model container [2021-11-23 12:22:41,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:22:41" (1/1) ... [2021-11-23 12:22:41,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:22:41,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:22:41,763 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/sv-benchmarks/c/eca-rers2012/Problem13_label13.c[8099,8112] [2021-11-23 12:22:43,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:22:43,181 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:22:43,210 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/sv-benchmarks/c/eca-rers2012/Problem13_label13.c[8099,8112] [2021-11-23 12:22:44,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:22:44,192 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:22:44,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44 WrapperNode [2021-11-23 12:22:44,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:22:44,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:22:44,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:22:44,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:22:44,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:44,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:44,980 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 12:22:44,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:22:44,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:22:44,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:22:44,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:22:45,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:45,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:45,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:45,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:45,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:45,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:45,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:45,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:22:45,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:22:45,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:22:45,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:22:45,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (1/1) ... [2021-11-23 12:22:45,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:22:45,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:45,690 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:22:45,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:22:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:22:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:22:45,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:22:45,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:22:45,845 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:22:45,847 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:22:51,731 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:22:51,761 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:22:51,761 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 12:22:51,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:22:51 BoogieIcfgContainer [2021-11-23 12:22:51,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:22:51,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:22:51,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:22:51,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:22:51,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:22:41" (1/3) ... [2021-11-23 12:22:51,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20729879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:22:51, skipping insertion in model container [2021-11-23 12:22:51,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:44" (2/3) ... [2021-11-23 12:22:51,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20729879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:22:51, skipping insertion in model container [2021-11-23 12:22:51,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:22:51" (3/3) ... [2021-11-23 12:22:51,776 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label13.c [2021-11-23 12:22:51,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:22:51,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:22:51,882 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:22:51,890 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 [2021-11-23 12:22:51,890 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:22:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 12:22:52,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:52,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:52,025 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash -66916295, now seen corresponding path program 1 times [2021-11-23 12:22:52,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:52,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001639103] [2021-11-23 12:22:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:52,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:22:52,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001639103] [2021-11-23 12:22:52,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001639103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:22:52,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:22:52,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:22:52,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920798766] [2021-11-23 12:22:52,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:22:52,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:22:52,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:22:52,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:22:52,577 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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) [2021-11-23 12:23:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:00,684 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-11-23 12:23:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:23:00,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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 57 [2021-11-23 12:23:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:00,734 INFO L225 Difference]: With dead ends: 3829 [2021-11-23 12:23:00,734 INFO L226 Difference]: Without dead ends: 2664 [2021-11-23 12:23:00,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:23:00,746 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2676 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2676 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:00,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2676 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 12:23:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-11-23 12:23:00,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-11-23 12:23:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-11-23 12:23:00,935 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 57 [2021-11-23 12:23:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:00,937 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-11-23 12:23:00,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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) [2021-11-23 12:23:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-11-23 12:23:00,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 12:23:00,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:00,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:00,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:23:00,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:00,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:00,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1953647055, now seen corresponding path program 1 times [2021-11-23 12:23:00,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:00,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209156197] [2021-11-23 12:23:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:00,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 12:23:01,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209156197] [2021-11-23 12:23:01,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209156197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:01,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:01,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:23:01,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275222811] [2021-11-23 12:23:01,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:01,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:01,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:01,318 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 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) [2021-11-23 12:23:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:06,426 INFO L93 Difference]: Finished difference Result 6142 states and 9712 transitions. [2021-11-23 12:23:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:06,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 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 182 [2021-11-23 12:23:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:06,453 INFO L225 Difference]: With dead ends: 6142 [2021-11-23 12:23:06,453 INFO L226 Difference]: Without dead ends: 4268 [2021-11-23 12:23:06,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:06,463 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 743 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:06,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 1188 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-23 12:23:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-11-23 12:23:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 4254. [2021-11-23 12:23:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 4253 states have (on average 1.3515165765342112) internal successors, (5748), 4253 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 5748 transitions. [2021-11-23 12:23:06,594 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 5748 transitions. Word has length 182 [2021-11-23 12:23:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:06,597 INFO L470 AbstractCegarLoop]: Abstraction has 4254 states and 5748 transitions. [2021-11-23 12:23:06,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 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) [2021-11-23 12:23:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 5748 transitions. [2021-11-23 12:23:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 12:23:06,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:06,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:06,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:23:06,606 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1535774173, now seen corresponding path program 1 times [2021-11-23 12:23:06,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:06,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635890915] [2021-11-23 12:23:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:06,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 12:23:06,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:06,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635890915] [2021-11-23 12:23:06,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635890915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:06,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:06,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:23:06,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190344274] [2021-11-23 12:23:06,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:06,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:06,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:06,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:06,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:06,866 INFO L87 Difference]: Start difference. First operand 4254 states and 5748 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:11,069 INFO L93 Difference]: Finished difference Result 10897 states and 15274 transitions. [2021-11-23 12:23:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:11,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have 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 [2021-11-23 12:23:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:11,126 INFO L225 Difference]: With dead ends: 10897 [2021-11-23 12:23:11,126 INFO L226 Difference]: Without dead ends: 7432 [2021-11-23 12:23:11,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:11,134 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 905 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2567 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 3322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 2567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:11,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 955 Invalid, 3322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 2567 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 12:23:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-11-23 12:23:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 7426. [2021-11-23 12:23:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7426 states, 7425 states have (on average 1.288888888888889) internal successors, (9570), 7425 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 9570 transitions. [2021-11-23 12:23:11,323 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 9570 transitions. Word has length 224 [2021-11-23 12:23:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:11,324 INFO L470 AbstractCegarLoop]: Abstraction has 7426 states and 9570 transitions. [2021-11-23 12:23:11,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 9570 transitions. [2021-11-23 12:23:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-23 12:23:11,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:11,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:11,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:23:11,330 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash -424268410, now seen corresponding path program 1 times [2021-11-23 12:23:11,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:11,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504502567] [2021-11-23 12:23:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:11,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 12:23:11,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:11,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504502567] [2021-11-23 12:23:11,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504502567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:11,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:11,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:23:11,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118907818] [2021-11-23 12:23:11,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:11,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:11,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:11,461 INFO L87 Difference]: Start difference. First operand 7426 states and 9570 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:15,574 INFO L93 Difference]: Finished difference Result 19619 states and 25904 transitions. [2021-11-23 12:23:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-23 12:23:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:15,646 INFO L225 Difference]: With dead ends: 19619 [2021-11-23 12:23:15,646 INFO L226 Difference]: Without dead ends: 12982 [2021-11-23 12:23:15,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:15,656 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 907 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:15,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 637 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 12:23:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2021-11-23 12:23:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12975. [2021-11-23 12:23:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12975 states, 12974 states have (on average 1.2719284723292739) internal successors, (16502), 12974 states have internal predecessors, (16502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12975 states to 12975 states and 16502 transitions. [2021-11-23 12:23:16,005 INFO L78 Accepts]: Start accepts. Automaton has 12975 states and 16502 transitions. Word has length 238 [2021-11-23 12:23:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:16,006 INFO L470 AbstractCegarLoop]: Abstraction has 12975 states and 16502 transitions. [2021-11-23 12:23:16,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:16,007 INFO L276 IsEmpty]: Start isEmpty. Operand 12975 states and 16502 transitions. [2021-11-23 12:23:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-23 12:23:16,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:16,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:16,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:23:16,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1333823715, now seen corresponding path program 1 times [2021-11-23 12:23:16,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183159134] [2021-11-23 12:23:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:16,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 12:23:16,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:16,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183159134] [2021-11-23 12:23:16,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183159134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:16,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:16,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:23:16,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168267079] [2021-11-23 12:23:16,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:16,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:16,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:16,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:16,168 INFO L87 Difference]: Start difference. First operand 12975 states and 16502 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 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) [2021-11-23 12:23:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:19,762 INFO L93 Difference]: Finished difference Result 36180 states and 46592 transitions. [2021-11-23 12:23:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 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 254 [2021-11-23 12:23:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:19,816 INFO L225 Difference]: With dead ends: 36180 [2021-11-23 12:23:19,816 INFO L226 Difference]: Without dead ends: 23994 [2021-11-23 12:23:19,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:19,837 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:19,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 12:23:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23994 states. [2021-11-23 12:23:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23994 to 22416. [2021-11-23 12:23:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22416 states, 22415 states have (on average 1.211153245594468) internal successors, (27148), 22415 states have internal predecessors, (27148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22416 states to 22416 states and 27148 transitions. [2021-11-23 12:23:20,251 INFO L78 Accepts]: Start accepts. Automaton has 22416 states and 27148 transitions. Word has length 254 [2021-11-23 12:23:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:20,251 INFO L470 AbstractCegarLoop]: Abstraction has 22416 states and 27148 transitions. [2021-11-23 12:23:20,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 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) [2021-11-23 12:23:20,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22416 states and 27148 transitions. [2021-11-23 12:23:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-23 12:23:20,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:20,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:20,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:23:20,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:20,265 INFO L85 PathProgramCache]: Analyzing trace with hash 678495218, now seen corresponding path program 1 times [2021-11-23 12:23:20,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:20,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830219120] [2021-11-23 12:23:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:20,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 12:23:20,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:20,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830219120] [2021-11-23 12:23:20,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830219120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:20,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:20,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:23:20,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733671444] [2021-11-23 12:23:20,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:20,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:20,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:20,530 INFO L87 Difference]: Start difference. First operand 22416 states and 27148 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:24,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:24,678 INFO L93 Difference]: Finished difference Result 55858 states and 69068 transitions. [2021-11-23 12:23:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 297 [2021-11-23 12:23:24,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:24,756 INFO L225 Difference]: With dead ends: 55858 [2021-11-23 12:23:24,756 INFO L226 Difference]: Without dead ends: 34231 [2021-11-23 12:23:24,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:24,785 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 888 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:24,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 12:23:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34231 states. [2021-11-23 12:23:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34231 to 33434. [2021-11-23 12:23:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33434 states, 33433 states have (on average 1.1906200460622738) internal successors, (39806), 33433 states have internal predecessors, (39806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33434 states to 33434 states and 39806 transitions. [2021-11-23 12:23:25,325 INFO L78 Accepts]: Start accepts. Automaton has 33434 states and 39806 transitions. Word has length 297 [2021-11-23 12:23:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:25,326 INFO L470 AbstractCegarLoop]: Abstraction has 33434 states and 39806 transitions. [2021-11-23 12:23:25,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 33434 states and 39806 transitions. [2021-11-23 12:23:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-11-23 12:23:25,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:25,336 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:25,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:23:25,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1737785822, now seen corresponding path program 1 times [2021-11-23 12:23:25,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:25,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643983111] [2021-11-23 12:23:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:25,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 12:23:25,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643983111] [2021-11-23 12:23:25,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643983111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:25,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:25,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:23:25,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281095039] [2021-11-23 12:23:25,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:25,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:23:25,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:25,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:23:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:23:25,512 INFO L87 Difference]: Start difference. First operand 33434 states and 39806 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:33,306 INFO L93 Difference]: Finished difference Result 117460 states and 141039 transitions. [2021-11-23 12:23:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:23:33,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2021-11-23 12:23:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:33,458 INFO L225 Difference]: With dead ends: 117460 [2021-11-23 12:23:33,458 INFO L226 Difference]: Without dead ends: 84815 [2021-11-23 12:23:33,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:23:33,504 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 1739 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 6065 mSolverCounterSat, 1189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 7254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1189 IncrementalHoareTripleChecker+Valid, 6065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:33,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 690 Invalid, 7254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1189 Valid, 6065 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 12:23:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84815 states. [2021-11-23 12:23:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84815 to 83900. [2021-11-23 12:23:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83900 states, 83899 states have (on average 1.1735539160180692) internal successors, (98460), 83899 states have internal predecessors, (98460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83900 states to 83900 states and 98460 transitions. [2021-11-23 12:23:34,981 INFO L78 Accepts]: Start accepts. Automaton has 83900 states and 98460 transitions. Word has length 345 [2021-11-23 12:23:34,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:34,982 INFO L470 AbstractCegarLoop]: Abstraction has 83900 states and 98460 transitions. [2021-11-23 12:23:34,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 83900 states and 98460 transitions. [2021-11-23 12:23:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-23 12:23:34,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:34,993 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:34,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:23:34,994 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -127471989, now seen corresponding path program 1 times [2021-11-23 12:23:34,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:34,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345686266] [2021-11-23 12:23:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:34,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-23 12:23:35,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:35,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345686266] [2021-11-23 12:23:35,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345686266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:35,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:35,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:23:35,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32501834] [2021-11-23 12:23:35,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:35,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:35,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:35,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:35,530 INFO L87 Difference]: Start difference. First operand 83900 states and 98460 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:39,982 INFO L93 Difference]: Finished difference Result 156777 states and 185083 transitions. [2021-11-23 12:23:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 354 [2021-11-23 12:23:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:40,112 INFO L225 Difference]: With dead ends: 156777 [2021-11-23 12:23:40,112 INFO L226 Difference]: Without dead ends: 83909 [2021-11-23 12:23:40,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:40,142 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 728 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:40,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1201 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 12:23:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83909 states. [2021-11-23 12:23:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83909 to 83900. [2021-11-23 12:23:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83900 states, 83899 states have (on average 1.172779174960369) internal successors, (98395), 83899 states have internal predecessors, (98395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83900 states to 83900 states and 98395 transitions. [2021-11-23 12:23:41,689 INFO L78 Accepts]: Start accepts. Automaton has 83900 states and 98395 transitions. Word has length 354 [2021-11-23 12:23:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:41,690 INFO L470 AbstractCegarLoop]: Abstraction has 83900 states and 98395 transitions. [2021-11-23 12:23:41,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 83900 states and 98395 transitions. [2021-11-23 12:23:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-11-23 12:23:41,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:41,732 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:41,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:23:41,733 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1869300435, now seen corresponding path program 1 times [2021-11-23 12:23:41,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:41,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428881058] [2021-11-23 12:23:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:41,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 278 proven. 113 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 12:23:42,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:42,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428881058] [2021-11-23 12:23:42,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428881058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:42,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782127607] [2021-11-23 12:23:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:42,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:42,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:42,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:42,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:23:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:23:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 12:23:43,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:23:43,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782127607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:43,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:23:43,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-23 12:23:43,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095524934] [2021-11-23 12:23:43,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:43,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:43,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:43,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:43,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:23:43,475 INFO L87 Difference]: Start difference. First operand 83900 states and 98395 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:47,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:47,724 INFO L93 Difference]: Finished difference Result 167009 states and 195995 transitions. [2021-11-23 12:23:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:47,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 383 [2021-11-23 12:23:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:47,882 INFO L225 Difference]: With dead ends: 167009 [2021-11-23 12:23:47,883 INFO L226 Difference]: Without dead ends: 83898 [2021-11-23 12:23:47,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:23:47,924 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 1123 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:47,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1123 Valid, 1447 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 12:23:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83898 states. [2021-11-23 12:23:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83898 to 83110. [2021-11-23 12:23:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83110 states, 83109 states have (on average 1.1286142295058297) internal successors, (93798), 83109 states have internal predecessors, (93798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83110 states to 83110 states and 93798 transitions. [2021-11-23 12:23:49,379 INFO L78 Accepts]: Start accepts. Automaton has 83110 states and 93798 transitions. Word has length 383 [2021-11-23 12:23:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:49,381 INFO L470 AbstractCegarLoop]: Abstraction has 83110 states and 93798 transitions. [2021-11-23 12:23:49,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 83110 states and 93798 transitions. [2021-11-23 12:23:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-11-23 12:23:49,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:49,403 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:49,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:49,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 12:23:49,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:49,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash -289451502, now seen corresponding path program 1 times [2021-11-23 12:23:49,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:49,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361872659] [2021-11-23 12:23:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:49,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 709 backedges. 548 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-23 12:23:49,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:49,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361872659] [2021-11-23 12:23:49,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361872659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:49,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:49,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:23:49,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921578210] [2021-11-23 12:23:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:49,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:49,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:49,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:49,858 INFO L87 Difference]: Start difference. First operand 83110 states and 93798 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 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) [2021-11-23 12:23:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:54,594 INFO L93 Difference]: Finished difference Result 191411 states and 218503 transitions. [2021-11-23 12:23:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:23:54,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 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) Word has length 413 [2021-11-23 12:23:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:54,726 INFO L225 Difference]: With dead ends: 191411 [2021-11-23 12:23:54,726 INFO L226 Difference]: Without dead ends: 109090 [2021-11-23 12:23:54,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:54,751 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 892 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 933 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:54,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 944 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [933 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 12:23:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109090 states. [2021-11-23 12:23:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109090 to 107496. [2021-11-23 12:23:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107496 states, 107495 states have (on average 1.13280617703149) internal successors, (121771), 107495 states have internal predecessors, (121771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107496 states to 107496 states and 121771 transitions. [2021-11-23 12:23:56,335 INFO L78 Accepts]: Start accepts. Automaton has 107496 states and 121771 transitions. Word has length 413 [2021-11-23 12:23:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:56,336 INFO L470 AbstractCegarLoop]: Abstraction has 107496 states and 121771 transitions. [2021-11-23 12:23:56,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 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) [2021-11-23 12:23:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 107496 states and 121771 transitions. [2021-11-23 12:23:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-11-23 12:23:56,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:56,353 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:56,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:23:56,353 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:56,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:56,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1031117907, now seen corresponding path program 1 times [2021-11-23 12:23:56,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:56,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281737409] [2021-11-23 12:23:56,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:56,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 446 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 12:23:56,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:56,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281737409] [2021-11-23 12:23:56,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281737409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:23:56,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:23:56,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:23:56,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919142320] [2021-11-23 12:23:56,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:23:56,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:23:56,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:56,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:23:56,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:23:56,587 INFO L87 Difference]: Start difference. First operand 107496 states and 121771 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 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) [2021-11-23 12:24:01,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:24:01,667 INFO L93 Difference]: Finished difference Result 239402 states and 273697 transitions. [2021-11-23 12:24:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:24:01,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 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 451 [2021-11-23 12:24:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:24:01,840 INFO L225 Difference]: With dead ends: 239402 [2021-11-23 12:24:01,840 INFO L226 Difference]: Without dead ends: 132695 [2021-11-23 12:24:01,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:24:01,885 INFO L933 BasicCegarLoop]: 1787 mSDtfsCounter, 781 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:24:01,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 1938 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 12:24:02,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132695 states. [2021-11-23 12:24:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132695 to 132678. [2021-11-23 12:24:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132678 states, 132677 states have (on average 1.1164859018518658) internal successors, (148132), 132677 states have internal predecessors, (148132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132678 states to 132678 states and 148132 transitions. [2021-11-23 12:24:03,780 INFO L78 Accepts]: Start accepts. Automaton has 132678 states and 148132 transitions. Word has length 451 [2021-11-23 12:24:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:24:03,781 INFO L470 AbstractCegarLoop]: Abstraction has 132678 states and 148132 transitions. [2021-11-23 12:24:03,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 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) [2021-11-23 12:24:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 132678 states and 148132 transitions. [2021-11-23 12:24:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2021-11-23 12:24:03,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:24:03,801 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:03,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:24:03,802 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:24:03,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:03,803 INFO L85 PathProgramCache]: Analyzing trace with hash 581013402, now seen corresponding path program 1 times [2021-11-23 12:24:03,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:03,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124958722] [2021-11-23 12:24:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:03,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 347 proven. 113 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-23 12:24:04,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:04,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124958722] [2021-11-23 12:24:04,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124958722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:04,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270573859] [2021-11-23 12:24:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:04,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:04,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:04,220 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:04,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:24:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:24:04,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-23 12:24:05,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:24:05,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270573859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:24:05,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:24:05,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-23 12:24:05,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599510675] [2021-11-23 12:24:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:24:05,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:24:05,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:24:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:24:05,934 INFO L87 Difference]: Start difference. First operand 132678 states and 148132 transitions. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:24:10,437 INFO L93 Difference]: Finished difference Result 259020 states and 291117 transitions. [2021-11-23 12:24:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:24:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 487 [2021-11-23 12:24:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:24:10,600 INFO L225 Difference]: With dead ends: 259020 [2021-11-23 12:24:10,600 INFO L226 Difference]: Without dead ends: 142879 [2021-11-23 12:24:10,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:24:10,636 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 1135 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-23 12:24:10,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 389 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-11-23 12:24:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142879 states. [2021-11-23 12:24:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142879 to 142879. [2021-11-23 12:24:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142879 states, 142878 states have (on average 1.1109408026428143) internal successors, (158729), 142878 states have internal predecessors, (158729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142879 states to 142879 states and 158729 transitions. [2021-11-23 12:24:12,946 INFO L78 Accepts]: Start accepts. Automaton has 142879 states and 158729 transitions. Word has length 487 [2021-11-23 12:24:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:24:12,946 INFO L470 AbstractCegarLoop]: Abstraction has 142879 states and 158729 transitions. [2021-11-23 12:24:12,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 142879 states and 158729 transitions. [2021-11-23 12:24:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-11-23 12:24:12,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:24:12,965 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:12,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:24:13,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:13,168 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:24:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash -777668327, now seen corresponding path program 1 times [2021-11-23 12:24:13,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:13,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146227864] [2021-11-23 12:24:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:13,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 179 proven. 258 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:24:13,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:13,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146227864] [2021-11-23 12:24:13,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146227864] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:24:13,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887871888] [2021-11-23 12:24:13,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:13,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:24:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:24:13,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:24:13,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:24:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:13,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:24:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:24:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-11-23 12:24:16,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:24:16,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887871888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:24:16,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:24:16,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-23 12:24:16,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40324812] [2021-11-23 12:24:16,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:24:16,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:24:16,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:16,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:24:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:24:16,191 INFO L87 Difference]: Start difference. First operand 142879 states and 158729 transitions. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:24:20,271 INFO L93 Difference]: Finished difference Result 273170 states and 304378 transitions. [2021-11-23 12:24:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:24:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 522 [2021-11-23 12:24:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:24:20,444 INFO L225 Difference]: With dead ends: 273170 [2021-11-23 12:24:20,444 INFO L226 Difference]: Without dead ends: 146828 [2021-11-23 12:24:20,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:24:20,486 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 544 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:24:20,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [544 Valid, 1142 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 12:24:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146828 states. [2021-11-23 12:24:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146828 to 146818. [2021-11-23 12:24:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146818 states, 146817 states have (on average 1.1091903526158415) internal successors, (162848), 146817 states have internal predecessors, (162848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146818 states to 146818 states and 162848 transitions. [2021-11-23 12:24:23,046 INFO L78 Accepts]: Start accepts. Automaton has 146818 states and 162848 transitions. Word has length 522 [2021-11-23 12:24:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:24:23,046 INFO L470 AbstractCegarLoop]: Abstraction has 146818 states and 162848 transitions. [2021-11-23 12:24:23,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 2 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 146818 states and 162848 transitions. [2021-11-23 12:24:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-23 12:24:23,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:24:23,064 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:23,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:24:23,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e3dda53-2aa1-4fde-b0d2-185f2bca67a0/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 12:24:23,271 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:24:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:23,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2017215681, now seen corresponding path program 1 times [2021-11-23 12:24:23,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:23,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144294823] [2021-11-23 12:24:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:23,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2021-11-23 12:24:23,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144294823] [2021-11-23 12:24:23,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144294823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:24:23,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:24:23,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:24:23,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923137380] [2021-11-23 12:24:23,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:24:23,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:24:23,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:24:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:24:23,502 INFO L87 Difference]: Start difference. First operand 146818 states and 162848 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 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) [2021-11-23 12:24:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:24:26,555 INFO L93 Difference]: Finished difference Result 275508 states and 306386 transitions. [2021-11-23 12:24:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:24:26,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 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) Word has length 542 [2021-11-23 12:24:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:24:26,704 INFO L225 Difference]: With dead ends: 275508 [2021-11-23 12:24:26,704 INFO L226 Difference]: Without dead ends: 145227 [2021-11-23 12:24:26,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:24:26,739 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 1633 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:24:26,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 297 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 12:24:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145227 states. [2021-11-23 12:24:28,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145227 to 145226. [2021-11-23 12:24:28,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145226 states, 145225 states have (on average 1.1071647443621966) internal successors, (160788), 145225 states have internal predecessors, (160788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145226 states to 145226 states and 160788 transitions. [2021-11-23 12:24:29,055 INFO L78 Accepts]: Start accepts. Automaton has 145226 states and 160788 transitions. Word has length 542 [2021-11-23 12:24:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:24:29,055 INFO L470 AbstractCegarLoop]: Abstraction has 145226 states and 160788 transitions. [2021-11-23 12:24:29,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 2 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) [2021-11-23 12:24:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 145226 states and 160788 transitions. [2021-11-23 12:24:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2021-11-23 12:24:29,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:24:29,079 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:29,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:24:29,079 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:24:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1742141744, now seen corresponding path program 1 times [2021-11-23 12:24:29,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:29,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342767754] [2021-11-23 12:24:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:29,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 848 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-23 12:24:29,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:29,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342767754] [2021-11-23 12:24:29,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342767754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:24:29,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:24:29,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:24:29,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844084034] [2021-11-23 12:24:29,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:24:29,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:24:29,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:29,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:24:29,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:24:29,343 INFO L87 Difference]: Start difference. First operand 145226 states and 160788 transitions. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:33,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:24:33,947 INFO L93 Difference]: Finished difference Result 289670 states and 320797 transitions. [2021-11-23 12:24:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:24:33,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 580 [2021-11-23 12:24:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:24:34,110 INFO L225 Difference]: With dead ends: 289670 [2021-11-23 12:24:34,110 INFO L226 Difference]: Without dead ends: 145233 [2021-11-23 12:24:34,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:24:34,150 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 831 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:24:34,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 1434 Invalid, 3050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-23 12:24:34,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145233 states. [2021-11-23 12:24:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145233 to 145219. [2021-11-23 12:24:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145219 states, 145218 states have (on average 1.0820215124846781) internal successors, (157129), 145218 states have internal predecessors, (157129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145219 states to 145219 states and 157129 transitions. [2021-11-23 12:24:36,559 INFO L78 Accepts]: Start accepts. Automaton has 145219 states and 157129 transitions. Word has length 580 [2021-11-23 12:24:36,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:24:36,560 INFO L470 AbstractCegarLoop]: Abstraction has 145219 states and 157129 transitions. [2021-11-23 12:24:36,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:24:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 145219 states and 157129 transitions. [2021-11-23 12:24:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2021-11-23 12:24:36,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:24:36,583 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:24:36,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:24:36,583 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:24:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:24:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1217140258, now seen corresponding path program 1 times [2021-11-23 12:24:36,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:24:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311326198] [2021-11-23 12:24:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:24:36,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:24:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:24:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 561 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-23 12:24:36,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:24:36,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311326198] [2021-11-23 12:24:36,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311326198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:24:36,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:24:36,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:24:36,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157568343] [2021-11-23 12:24:36,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:24:36,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:24:36,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:24:36,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:24:36,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:24:36,752 INFO L87 Difference]: Start difference. First operand 145219 states and 157129 transitions. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)