./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label17.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label17.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU --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 d5ce10b415c8706a9c163992802d3ffc66c067ac6ef9711912e3377baf22b40a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:05:17,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:05:17,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:05:17,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:05:17,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:05:17,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:05:17,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:05:17,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:05:17,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:05:17,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:05:17,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:05:17,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:05:17,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:05:17,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:05:17,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:05:17,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:05:17,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:05:17,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:05:17,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:05:17,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:05:17,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:05:17,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:05:17,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:05:17,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:05:17,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:05:17,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:05:17,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:05:17,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:05:17,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:05:17,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:05:17,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:05:17,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:05:17,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:05:17,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:05:17,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:05:17,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:05:17,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:05:17,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:05:17,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:05:17,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:05:17,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:05:17,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:05:18,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:05:18,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:05:18,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:05:18,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:05:18,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:05:18,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:05:18,024 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:05:18,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:05:18,025 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:05:18,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:05:18,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:05:18,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:05:18,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:05:18,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:05:18,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:05:18,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:05:18,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:05:18,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:05:18,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:05:18,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:05:18,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:05:18,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:05:18,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:05:18,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:05:18,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:05:18,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:05:18,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:05:18,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:05:18,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:05:18,031 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:05:18,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:05:18,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:05:18,031 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_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5ce10b415c8706a9c163992802d3ffc66c067ac6ef9711912e3377baf22b40a [2021-11-02 23:05:18,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:05:18,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:05:18,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:05:18,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:05:18,365 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:05:18,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2021-11-02 23:05:18,441 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/data/63f2138ea/ebdf2743916e434a8f8d8fc07c22e732/FLAG6dfde1ace [2021-11-02 23:05:19,254 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:05:19,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/sv-benchmarks/c/eca-rers2012/Problem12_label17.c [2021-11-02 23:05:19,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/data/63f2138ea/ebdf2743916e434a8f8d8fc07c22e732/FLAG6dfde1ace [2021-11-02 23:05:19,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/data/63f2138ea/ebdf2743916e434a8f8d8fc07c22e732 [2021-11-02 23:05:19,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:05:19,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:05:19,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:05:19,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:05:19,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:05:19,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:05:19" (1/1) ... [2021-11-02 23:05:19,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ceb0e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:19, skipping insertion in model container [2021-11-02 23:05:19,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:05:19" (1/1) ... [2021-11-02 23:05:19,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:05:19,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:05:20,340 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2021-11-02 23:05:21,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:05:21,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:05:21,420 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/sv-benchmarks/c/eca-rers2012/Problem12_label17.c[5134,5147] [2021-11-02 23:05:22,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:05:22,103 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:05:22,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22 WrapperNode [2021-11-02 23:05:22,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:05:22,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:05:22,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:05:22,107 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:05:22,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:22,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:22,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:05:22,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:05:22,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:05:22,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:05:22,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:22,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:22,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:22,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:22,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:23,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:23,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:23,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:05:23,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:05:23,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:05:23,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:05:23,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (1/1) ... [2021-11-02 23:05:23,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:05:23,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:23,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:05:23,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:05:23,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:05:23,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:05:23,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:05:23,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:05:28,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:05:28,050 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-02 23:05:28,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:05:28 BoogieIcfgContainer [2021-11-02 23:05:28,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:05:28,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:05:28,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:05:28,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:05:28,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:05:19" (1/3) ... [2021-11-02 23:05:28,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f897fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:05:28, skipping insertion in model container [2021-11-02 23:05:28,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:22" (2/3) ... [2021-11-02 23:05:28,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f897fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:05:28, skipping insertion in model container [2021-11-02 23:05:28,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:05:28" (3/3) ... [2021-11-02 23:05:28,065 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label17.c [2021-11-02 23:05:28,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:05:28,071 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:05:28,147 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:05:28,154 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 [2021-11-02 23:05:28,154 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:05:28,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:28,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:05:28,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:28,266 INFO L513 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] [2021-11-02 23:05:28,271 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2102454322, now seen corresponding path program 1 times [2021-11-02 23:05:28,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:28,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905350073] [2021-11-02 23:05:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:28,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:28,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:28,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905350073] [2021-11-02 23:05:28,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905350073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:28,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:28,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:05:28,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241014604] [2021-11-02 23:05:28,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:28,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:28,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:28,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:28,696 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:33,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:33,586 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-02 23:05:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:05:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 23:05:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:33,617 INFO L225 Difference]: With dead ends: 2388 [2021-11-02 23:05:33,617 INFO L226 Difference]: Without dead ends: 1506 [2021-11-02 23:05:33,625 INFO L786 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 [2021-11-02 23:05:33,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-02 23:05:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-02 23:05:33,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.8458471760797341) internal successors, (2778), 1505 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2778 transitions. [2021-11-02 23:05:33,780 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2778 transitions. Word has length 40 [2021-11-02 23:05:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:33,781 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2778 transitions. [2021-11-02 23:05:33,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:33,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2778 transitions. [2021-11-02 23:05:33,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-02 23:05:33,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:33,787 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:33,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:05:33,788 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash 844472710, now seen corresponding path program 1 times [2021-11-02 23:05:33,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:33,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197982725] [2021-11-02 23:05:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:33,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:34,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:34,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197982725] [2021-11-02 23:05:34,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197982725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:34,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:34,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:05:34,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241036702] [2021-11-02 23:05:34,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:34,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:34,059 INFO L87 Difference]: Start difference. First operand 1506 states and 2778 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:38,080 INFO L93 Difference]: Finished difference Result 3761 states and 6893 transitions. [2021-11-02 23:05:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:05:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-02 23:05:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:38,096 INFO L225 Difference]: With dead ends: 3761 [2021-11-02 23:05:38,097 INFO L226 Difference]: Without dead ends: 2257 [2021-11-02 23:05:38,100 INFO L786 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 [2021-11-02 23:05:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-11-02 23:05:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-11-02 23:05:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.4419326241134751) internal successors, (3253), 2256 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3253 transitions. [2021-11-02 23:05:38,166 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3253 transitions. Word has length 109 [2021-11-02 23:05:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:38,169 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3253 transitions. [2021-11-02 23:05:38,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3253 transitions. [2021-11-02 23:05:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-02 23:05:38,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:38,181 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:38,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:05:38,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:38,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:38,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2055292671, now seen corresponding path program 1 times [2021-11-02 23:05:38,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:38,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284998664] [2021-11-02 23:05:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:38,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:38,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:38,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284998664] [2021-11-02 23:05:38,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284998664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:38,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:38,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:38,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373679411] [2021-11-02 23:05:38,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:05:38,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:38,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:05:38,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:38,415 INFO L87 Difference]: Start difference. First operand 2257 states and 3253 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:43,416 INFO L93 Difference]: Finished difference Result 6802 states and 9791 transitions. [2021-11-02 23:05:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:05:43,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-02 23:05:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:43,457 INFO L225 Difference]: With dead ends: 6802 [2021-11-02 23:05:43,457 INFO L226 Difference]: Without dead ends: 4510 [2021-11-02 23:05:43,462 INFO L786 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 [2021-11-02 23:05:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2021-11-02 23:05:43,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 3759. [2021-11-02 23:05:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.2714209686003193) internal successors, (4778), 3758 states have internal predecessors, (4778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:43,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 4778 transitions. [2021-11-02 23:05:43,564 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 4778 transitions. Word has length 111 [2021-11-02 23:05:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:43,567 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 4778 transitions. [2021-11-02 23:05:43,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 4778 transitions. [2021-11-02 23:05:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-02 23:05:43,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:43,573 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 23:05:43,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:05:43,573 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:43,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:43,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1759287711, now seen corresponding path program 1 times [2021-11-02 23:05:43,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:43,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043198197] [2021-11-02 23:05:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:43,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:05:43,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:43,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043198197] [2021-11-02 23:05:43,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043198197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:43,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:43,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:43,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605787503] [2021-11-02 23:05:43,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:05:43,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:05:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:43,906 INFO L87 Difference]: Start difference. First operand 3759 states and 4778 transitions. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:48,349 INFO L93 Difference]: Finished difference Result 9808 states and 12774 transitions. [2021-11-02 23:05:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:05:48,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2021-11-02 23:05:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:48,392 INFO L225 Difference]: With dead ends: 9808 [2021-11-02 23:05:48,392 INFO L226 Difference]: Without dead ends: 6014 [2021-11-02 23:05:48,398 INFO L786 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 [2021-11-02 23:05:48,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6014 states. [2021-11-02 23:05:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6014 to 6012. [2021-11-02 23:05:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.222758276493096) internal successors, (7350), 6011 states have internal predecessors, (7350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7350 transitions. [2021-11-02 23:05:48,544 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7350 transitions. Word has length 252 [2021-11-02 23:05:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:48,546 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 7350 transitions. [2021-11-02 23:05:48,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7350 transitions. [2021-11-02 23:05:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-02 23:05:48,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:48,551 INFO L513 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 23:05:48,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:05:48,552 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1438391502, now seen corresponding path program 1 times [2021-11-02 23:05:48,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:48,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862245997] [2021-11-02 23:05:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:48,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:05:48,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:48,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862245997] [2021-11-02 23:05:48,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862245997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:48,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:48,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:48,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658242264] [2021-11-02 23:05:48,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:05:48,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:48,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:05:48,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:48,781 INFO L87 Difference]: Start difference. First operand 6012 states and 7350 transitions. Second operand has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:53,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:53,680 INFO L93 Difference]: Finished difference Result 18030 states and 22021 transitions. [2021-11-02 23:05:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:05:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2021-11-02 23:05:53,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:53,738 INFO L225 Difference]: With dead ends: 18030 [2021-11-02 23:05:53,739 INFO L226 Difference]: Without dead ends: 12020 [2021-11-02 23:05:53,748 INFO L786 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 [2021-11-02 23:05:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-11-02 23:05:53,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 10518. [2021-11-02 23:05:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10518 states, 10517 states have (on average 1.156223257582961) internal successors, (12160), 10517 states have internal predecessors, (12160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10518 states to 10518 states and 12160 transitions. [2021-11-02 23:05:53,983 INFO L78 Accepts]: Start accepts. Automaton has 10518 states and 12160 transitions. Word has length 253 [2021-11-02 23:05:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:53,983 INFO L470 AbstractCegarLoop]: Abstraction has 10518 states and 12160 transitions. [2021-11-02 23:05:53,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10518 states and 12160 transitions. [2021-11-02 23:05:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2021-11-02 23:05:53,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:53,991 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:53,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:05:53,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash 514166394, now seen corresponding path program 1 times [2021-11-02 23:05:53,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:53,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236283727] [2021-11-02 23:05:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:53,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-02 23:05:54,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:54,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236283727] [2021-11-02 23:05:54,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236283727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:54,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:54,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:54,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362884637] [2021-11-02 23:05:54,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:54,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:54,153 INFO L87 Difference]: Start difference. First operand 10518 states and 12160 transitions. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:58,453 INFO L93 Difference]: Finished difference Result 30797 states and 35716 transitions. [2021-11-02 23:05:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:05:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 335 [2021-11-02 23:05:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:58,534 INFO L225 Difference]: With dead ends: 30797 [2021-11-02 23:05:58,534 INFO L226 Difference]: Without dead ends: 20281 [2021-11-02 23:05:58,550 INFO L786 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 [2021-11-02 23:05:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20281 states. [2021-11-02 23:05:58,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20281 to 18779. [2021-11-02 23:05:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18779 states, 18778 states have (on average 1.1468207476834593) internal successors, (21535), 18778 states have internal predecessors, (21535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 21535 transitions. [2021-11-02 23:05:58,951 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 21535 transitions. Word has length 335 [2021-11-02 23:05:58,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:58,952 INFO L470 AbstractCegarLoop]: Abstraction has 18779 states and 21535 transitions. [2021-11-02 23:05:58,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:05:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 21535 transitions. [2021-11-02 23:05:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-02 23:05:58,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:58,963 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:58,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:05:58,963 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:05:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:58,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1531787760, now seen corresponding path program 1 times [2021-11-02 23:05:58,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:58,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306468074] [2021-11-02 23:05:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:58,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-02 23:05:59,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:59,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306468074] [2021-11-02 23:05:59,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306468074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:59,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:59,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:59,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036185940] [2021-11-02 23:05:59,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:59,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:59,168 INFO L87 Difference]: Start difference. First operand 18779 states and 21535 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:02,724 INFO L93 Difference]: Finished difference Result 45817 states and 53206 transitions. [2021-11-02 23:06:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:02,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-11-02 23:06:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:02,793 INFO L225 Difference]: With dead ends: 45817 [2021-11-02 23:06:02,793 INFO L226 Difference]: Without dead ends: 27040 [2021-11-02 23:06:02,815 INFO L786 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 [2021-11-02 23:06:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27040 states. [2021-11-02 23:06:03,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27040 to 27040. [2021-11-02 23:06:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 1.1358778061318835) internal successors, (30713), 27039 states have internal predecessors, (30713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 30713 transitions. [2021-11-02 23:06:03,328 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 30713 transitions. Word has length 339 [2021-11-02 23:06:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:03,332 INFO L470 AbstractCegarLoop]: Abstraction has 27040 states and 30713 transitions. [2021-11-02 23:06:03,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 30713 transitions. [2021-11-02 23:06:03,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-11-02 23:06:03,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:03,345 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:03,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:06:03,346 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1452005440, now seen corresponding path program 1 times [2021-11-02 23:06:03,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:03,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179052074] [2021-11-02 23:06:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:03,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-02 23:06:03,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:03,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179052074] [2021-11-02 23:06:03,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179052074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:03,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:03,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:03,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77231102] [2021-11-02 23:06:03,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:03,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:03,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:03,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:03,565 INFO L87 Difference]: Start difference. First operand 27040 states and 30713 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:07,434 INFO L93 Difference]: Finished difference Result 66845 states and 76343 transitions. [2021-11-02 23:06:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 371 [2021-11-02 23:06:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:07,525 INFO L225 Difference]: With dead ends: 66845 [2021-11-02 23:06:07,525 INFO L226 Difference]: Without dead ends: 39807 [2021-11-02 23:06:07,556 INFO L786 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 [2021-11-02 23:06:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39807 states. [2021-11-02 23:06:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39807 to 38305. [2021-11-02 23:06:08,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 1.1337719298245614) internal successors, (43428), 38304 states have internal predecessors, (43428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 43428 transitions. [2021-11-02 23:06:08,394 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 43428 transitions. Word has length 371 [2021-11-02 23:06:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:08,395 INFO L470 AbstractCegarLoop]: Abstraction has 38305 states and 43428 transitions. [2021-11-02 23:06:08,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 43428 transitions. [2021-11-02 23:06:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-02 23:06:08,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:08,422 INFO L513 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:08,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:06:08,423 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1665359754, now seen corresponding path program 1 times [2021-11-02 23:06:08,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:08,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744585791] [2021-11-02 23:06:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:08,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 305 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-02 23:06:08,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:08,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744585791] [2021-11-02 23:06:08,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744585791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:08,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:08,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:08,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728651000] [2021-11-02 23:06:08,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:08,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:08,650 INFO L87 Difference]: Start difference. First operand 38305 states and 43428 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:13,281 INFO L93 Difference]: Finished difference Result 94632 states and 108903 transitions. [2021-11-02 23:06:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 378 [2021-11-02 23:06:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:13,388 INFO L225 Difference]: With dead ends: 94632 [2021-11-02 23:06:13,388 INFO L226 Difference]: Without dead ends: 56329 [2021-11-02 23:06:13,411 INFO L786 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 [2021-11-02 23:06:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56329 states. [2021-11-02 23:06:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56329 to 54076. [2021-11-02 23:06:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54076 states, 54075 states have (on average 1.119815071659732) internal successors, (60554), 54075 states have internal predecessors, (60554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54076 states to 54076 states and 60554 transitions. [2021-11-02 23:06:14,474 INFO L78 Accepts]: Start accepts. Automaton has 54076 states and 60554 transitions. Word has length 378 [2021-11-02 23:06:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:14,475 INFO L470 AbstractCegarLoop]: Abstraction has 54076 states and 60554 transitions. [2021-11-02 23:06:14,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand 54076 states and 60554 transitions. [2021-11-02 23:06:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2021-11-02 23:06:14,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:14,504 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:14,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:06:14,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash -674997957, now seen corresponding path program 1 times [2021-11-02 23:06:14,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:14,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870533609] [2021-11-02 23:06:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:14,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:14,931 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-02 23:06:14,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:14,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870533609] [2021-11-02 23:06:14,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870533609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:14,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:14,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:14,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775686149] [2021-11-02 23:06:14,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:14,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:14,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:14,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:14,935 INFO L87 Difference]: Start difference. First operand 54076 states and 60554 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:19,181 INFO L93 Difference]: Finished difference Result 137439 states and 155087 transitions. [2021-11-02 23:06:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:19,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 461 [2021-11-02 23:06:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:19,287 INFO L225 Difference]: With dead ends: 137439 [2021-11-02 23:06:19,287 INFO L226 Difference]: Without dead ends: 80361 [2021-11-02 23:06:19,319 INFO L786 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 [2021-11-02 23:06:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80361 states. [2021-11-02 23:06:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80361 to 78859. [2021-11-02 23:06:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78859 states, 78858 states have (on average 1.0997108727079052) internal successors, (86721), 78858 states have internal predecessors, (86721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78859 states to 78859 states and 86721 transitions. [2021-11-02 23:06:20,820 INFO L78 Accepts]: Start accepts. Automaton has 78859 states and 86721 transitions. Word has length 461 [2021-11-02 23:06:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:20,823 INFO L470 AbstractCegarLoop]: Abstraction has 78859 states and 86721 transitions. [2021-11-02 23:06:20,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 78859 states and 86721 transitions. [2021-11-02 23:06:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-11-02 23:06:20,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:20,877 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 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] [2021-11-02 23:06:20,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:06:20,885 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:20,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:20,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1518347933, now seen corresponding path program 1 times [2021-11-02 23:06:20,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:20,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914141764] [2021-11-02 23:06:20,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:20,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-02 23:06:21,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:21,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914141764] [2021-11-02 23:06:21,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914141764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:21,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:21,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:21,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590483610] [2021-11-02 23:06:21,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:21,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:21,170 INFO L87 Difference]: Start difference. First operand 78859 states and 86721 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:25,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:25,422 INFO L93 Difference]: Finished difference Result 158467 states and 174153 transitions. [2021-11-02 23:06:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 473 [2021-11-02 23:06:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:25,521 INFO L225 Difference]: With dead ends: 158467 [2021-11-02 23:06:25,522 INFO L226 Difference]: Without dead ends: 79610 [2021-11-02 23:06:25,547 INFO L786 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 [2021-11-02 23:06:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79610 states. [2021-11-02 23:06:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79610 to 78108. [2021-11-02 23:06:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78108 states, 78107 states have (on average 1.0873929353323006) internal successors, (84933), 78107 states have internal predecessors, (84933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78108 states to 78108 states and 84933 transitions. [2021-11-02 23:06:26,833 INFO L78 Accepts]: Start accepts. Automaton has 78108 states and 84933 transitions. Word has length 473 [2021-11-02 23:06:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:26,834 INFO L470 AbstractCegarLoop]: Abstraction has 78108 states and 84933 transitions. [2021-11-02 23:06:26,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:26,834 INFO L276 IsEmpty]: Start isEmpty. Operand 78108 states and 84933 transitions. [2021-11-02 23:06:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-02 23:06:26,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:26,841 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:26,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:06:26,842 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash -688529288, now seen corresponding path program 1 times [2021-11-02 23:06:26,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:26,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381393211] [2021-11-02 23:06:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:26,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-02 23:06:27,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:27,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381393211] [2021-11-02 23:06:27,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381393211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:27,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:27,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:27,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193945122] [2021-11-02 23:06:27,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:27,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:27,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:27,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:27,032 INFO L87 Difference]: Start difference. First operand 78108 states and 84933 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:31,106 INFO L93 Difference]: Finished difference Result 156214 states and 169864 transitions. [2021-11-02 23:06:31,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2021-11-02 23:06:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:31,189 INFO L225 Difference]: With dead ends: 156214 [2021-11-02 23:06:31,189 INFO L226 Difference]: Without dead ends: 78108 [2021-11-02 23:06:31,209 INFO L786 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 [2021-11-02 23:06:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78108 states. [2021-11-02 23:06:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78108 to 74353. [2021-11-02 23:06:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74353 states, 74352 states have (on average 1.061034000430385) internal successors, (78890), 74352 states have internal predecessors, (78890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74353 states to 74353 states and 78890 transitions. [2021-11-02 23:06:32,337 INFO L78 Accepts]: Start accepts. Automaton has 74353 states and 78890 transitions. Word has length 474 [2021-11-02 23:06:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:32,338 INFO L470 AbstractCegarLoop]: Abstraction has 74353 states and 78890 transitions. [2021-11-02 23:06:32,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 74353 states and 78890 transitions. [2021-11-02 23:06:32,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-11-02 23:06:32,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:32,352 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:32,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:06:32,352 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash 995647817, now seen corresponding path program 1 times [2021-11-02 23:06:32,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:32,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197783642] [2021-11-02 23:06:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:32,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 454 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-02 23:06:32,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:32,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197783642] [2021-11-02 23:06:32,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197783642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:32,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:32,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:32,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751961813] [2021-11-02 23:06:32,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:32,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:32,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:32,619 INFO L87 Difference]: Start difference. First operand 74353 states and 78890 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:37,143 INFO L93 Difference]: Finished difference Result 189258 states and 201815 transitions. [2021-11-02 23:06:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:37,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 480 [2021-11-02 23:06:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:37,275 INFO L225 Difference]: With dead ends: 189258 [2021-11-02 23:06:37,275 INFO L226 Difference]: Without dead ends: 114907 [2021-11-02 23:06:37,307 INFO L786 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 [2021-11-02 23:06:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114907 states. [2021-11-02 23:06:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114907 to 111903. [2021-11-02 23:06:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111903 states, 111902 states have (on average 1.0594895533591893) internal successors, (118559), 111902 states have internal predecessors, (118559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111903 states to 111903 states and 118559 transitions. [2021-11-02 23:06:39,025 INFO L78 Accepts]: Start accepts. Automaton has 111903 states and 118559 transitions. Word has length 480 [2021-11-02 23:06:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:39,026 INFO L470 AbstractCegarLoop]: Abstraction has 111903 states and 118559 transitions. [2021-11-02 23:06:39,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 111903 states and 118559 transitions. [2021-11-02 23:06:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2021-11-02 23:06:39,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:39,058 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 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] [2021-11-02 23:06:39,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:06:39,058 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash -836361929, now seen corresponding path program 1 times [2021-11-02 23:06:39,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:39,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610087703] [2021-11-02 23:06:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:39,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2021-11-02 23:06:39,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:39,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610087703] [2021-11-02 23:06:39,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610087703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:39,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:39,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:06:39,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96033636] [2021-11-02 23:06:39,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:39,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:06:39,344 INFO L87 Difference]: Start difference. First operand 111903 states and 118559 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) [2021-11-02 23:06:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:43,671 INFO L93 Difference]: Finished difference Result 246334 states and 261362 transitions. [2021-11-02 23:06:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:43,672 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 565 [2021-11-02 23:06:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:43,826 INFO L225 Difference]: With dead ends: 246334 [2021-11-02 23:06:43,827 INFO L226 Difference]: Without dead ends: 134433 [2021-11-02 23:06:43,873 INFO L786 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 [2021-11-02 23:06:43,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134433 states. [2021-11-02 23:06:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134433 to 132931. [2021-11-02 23:06:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132931 states, 132930 states have (on average 1.0549462122921838) internal successors, (140234), 132930 states have internal predecessors, (140234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132931 states to 132931 states and 140234 transitions. [2021-11-02 23:06:46,025 INFO L78 Accepts]: Start accepts. Automaton has 132931 states and 140234 transitions. Word has length 565 [2021-11-02 23:06:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:46,026 INFO L470 AbstractCegarLoop]: Abstraction has 132931 states and 140234 transitions. [2021-11-02 23:06:46,026 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) [2021-11-02 23:06:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 132931 states and 140234 transitions. [2021-11-02 23:06:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2021-11-02 23:06:46,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:46,106 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:46,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:06:46,107 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:46,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2044369825, now seen corresponding path program 1 times [2021-11-02 23:06:46,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:46,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510883128] [2021-11-02 23:06:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:46,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 192 proven. 372 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-11-02 23:06:47,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:47,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510883128] [2021-11-02 23:06:47,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510883128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:47,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747398931] [2021-11-02 23:06:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:47,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:47,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:47,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:06:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:06:47,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 555 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-02 23:06:51,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747398931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:51,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:06:51,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-02 23:06:51,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277834150] [2021-11-02 23:06:51,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:06:51,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:51,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:06:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:06:51,257 INFO L87 Difference]: Start difference. First operand 132931 states and 140234 transitions. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:55,750 INFO L93 Difference]: Finished difference Result 302659 states and 320139 transitions. [2021-11-02 23:06:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:06:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1051 [2021-11-02 23:06:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:55,936 INFO L225 Difference]: With dead ends: 302659 [2021-11-02 23:06:55,936 INFO L226 Difference]: Without dead ends: 169730 [2021-11-02 23:06:55,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:06:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169730 states. [2021-11-02 23:06:58,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169730 to 165224. [2021-11-02 23:06:58,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165224 states, 165223 states have (on average 1.0503440804246382) internal successors, (173541), 165223 states have internal predecessors, (173541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165224 states to 165224 states and 173541 transitions. [2021-11-02 23:06:58,587 INFO L78 Accepts]: Start accepts. Automaton has 165224 states and 173541 transitions. Word has length 1051 [2021-11-02 23:06:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:58,588 INFO L470 AbstractCegarLoop]: Abstraction has 165224 states and 173541 transitions. [2021-11-02 23:06:58,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:06:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 165224 states and 173541 transitions. [2021-11-02 23:06:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1440 [2021-11-02 23:06:59,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:59,476 INFO L513 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:06:59,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:59,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97a2e039-db11-4cac-8286-0904841bc63f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:06:59,703 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:06:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:59,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2056965701, now seen corresponding path program 1 times [2021-11-02 23:06:59,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:59,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838786943] [2021-11-02 23:06:59,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:59,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 1666 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 23:07:00,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:00,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838786943] [2021-11-02 23:07:00,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838786943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:00,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:00,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:07:00,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913115907] [2021-11-02 23:07:00,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:07:00,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:00,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:07:00,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:07:00,812 INFO L87 Difference]: Start difference. First operand 165224 states and 173541 transitions. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:10,889 INFO L93 Difference]: Finished difference Result 450606 states and 472685 transitions. [2021-11-02 23:07:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:07:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1439 [2021-11-02 23:07:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:11,230 INFO L225 Difference]: With dead ends: 450606 [2021-11-02 23:07:11,230 INFO L226 Difference]: Without dead ends: 285384 [2021-11-02 23:07:11,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:07:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285384 states. [2021-11-02 23:07:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285384 to 240324. [2021-11-02 23:07:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240324 states, 240323 states have (on average 1.0483682377466992) internal successors, (251947), 240323 states have internal predecessors, (251947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240324 states to 240324 states and 251947 transitions. [2021-11-02 23:07:15,791 INFO L78 Accepts]: Start accepts. Automaton has 240324 states and 251947 transitions. Word has length 1439 [2021-11-02 23:07:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:15,792 INFO L470 AbstractCegarLoop]: Abstraction has 240324 states and 251947 transitions. [2021-11-02 23:07:15,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 240324 states and 251947 transitions. [2021-11-02 23:07:15,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1451 [2021-11-02 23:07:15,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:15,940 INFO L513 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:07:15,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:07:15,941 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:07:15,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:15,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2055564683, now seen corresponding path program 1 times [2021-11-02 23:07:15,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:07:15,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157864031] [2021-11-02 23:07:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:15,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:07:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 881 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-02 23:07:17,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:07:17,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157864031] [2021-11-02 23:07:17,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157864031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:17,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:17,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:07:17,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6046803] [2021-11-02 23:07:17,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:07:17,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:07:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:07:17,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:07:17,729 INFO L87 Difference]: Start difference. First operand 240324 states and 251947 transitions. Second operand has 3 states, 3 states have (on average 398.3333333333333) internal successors, (1195), 3 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:07:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:22,977 INFO L93 Difference]: Finished difference Result 521200 states and 546917 transitions. [2021-11-02 23:07:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:07:22,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 398.3333333333333) internal successors, (1195), 3 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1450 [2021-11-02 23:07:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:23,295 INFO L225 Difference]: With dead ends: 521200 [2021-11-02 23:07:23,295 INFO L226 Difference]: Without dead ends: 280878 [2021-11-02 23:07:23,389 INFO L786 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