./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem19_label31.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_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/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_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem19_label31.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/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_68034a8f-c4de-4126-a433-709a9c78ff8e/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 4a27e7c8c49da80061042a8dd4441b091ead4aa60c376eb90e4315bb4f4a782c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:25:45,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:25:45,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:25:45,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:25:45,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:25:45,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:25:45,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:25:45,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:25:45,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:25:45,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:25:45,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:25:45,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:25:45,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:25:45,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:25:45,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:25:45,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:25:45,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:25:45,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:25:45,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:25:45,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:25:45,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:25:45,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:25:45,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:25:45,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:25:45,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:25:45,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:25:45,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:25:45,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:25:45,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:25:45,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:25:45,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:25:45,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:25:45,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:25:45,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:25:45,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:25:45,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:25:45,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:25:45,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:25:45,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:25:45,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:25:45,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:25:45,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:25:45,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:25:45,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:25:45,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:25:45,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:25:45,251 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:25:45,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:25:45,251 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:25:45,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:25:45,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:25:45,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:25:45,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:25:45,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:25:45,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:25:45,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:25:45,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:25:45,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:25:45,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:25:45,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:25:45,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:25:45,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:25:45,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:25:45,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:25:45,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:25:45,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:25:45,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:25:45,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:25:45,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:25:45,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:25:45,258 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:25:45,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:25:45,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:25:45,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:25:45,259 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_68034a8f-c4de-4126-a433-709a9c78ff8e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a27e7c8c49da80061042a8dd4441b091ead4aa60c376eb90e4315bb4f4a782c [2021-11-02 22:25:45,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:25:45,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:25:45,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:25:45,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:25:45,625 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:25:45,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem19_label31.c [2021-11-02 22:25:45,702 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/data/0e387462d/7d7f0e5e3f3e45b78a1806d3a25302c2/FLAG9d27c51b6 [2021-11-02 22:25:46,843 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:25:46,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/sv-benchmarks/c/eca-rers2012/Problem19_label31.c [2021-11-02 22:25:46,900 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/data/0e387462d/7d7f0e5e3f3e45b78a1806d3a25302c2/FLAG9d27c51b6 [2021-11-02 22:25:47,104 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/data/0e387462d/7d7f0e5e3f3e45b78a1806d3a25302c2 [2021-11-02 22:25:47,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:25:47,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:25:47,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:25:47,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:25:47,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:25:47,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:25:47" (1/1) ... [2021-11-02 22:25:47,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602df6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:47, skipping insertion in model container [2021-11-02 22:25:47,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:25:47" (1/1) ... [2021-11-02 22:25:47,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:25:47,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:25:47,845 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_68034a8f-c4de-4126-a433-709a9c78ff8e/sv-benchmarks/c/eca-rers2012/Problem19_label31.c[2748,2761] [2021-11-02 22:25:49,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:25:49,961 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:25:49,996 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_68034a8f-c4de-4126-a433-709a9c78ff8e/sv-benchmarks/c/eca-rers2012/Problem19_label31.c[2748,2761] [2021-11-02 22:25:51,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:25:51,238 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:25:51,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51 WrapperNode [2021-11-02 22:25:51,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:25:51,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:25:51,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:25:51,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:25:51,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:51,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:52,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:25:52,696 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:25:52,696 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:25:52,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:25:52,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:52,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:53,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:53,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:53,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:53,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:53,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:53,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:25:53,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:25:53,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:25:53,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:25:53,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (1/1) ... [2021-11-02 22:25:53,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:25:53,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:25:53,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:25:53,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:25:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:25:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:25:53,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:25:53,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:26:03,829 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:26:03,829 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-02 22:26:03,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:26:03 BoogieIcfgContainer [2021-11-02 22:26:03,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:26:03,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:26:03,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:26:03,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:26:03,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:25:47" (1/3) ... [2021-11-02 22:26:03,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a03ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:26:03, skipping insertion in model container [2021-11-02 22:26:03,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:25:51" (2/3) ... [2021-11-02 22:26:03,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a03ed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:26:03, skipping insertion in model container [2021-11-02 22:26:03,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:26:03" (3/3) ... [2021-11-02 22:26:03,845 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label31.c [2021-11-02 22:26:03,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:26:03,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:26:03,915 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:26:03,922 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 22:26:03,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:26:03,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states 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 22:26:03,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:26:03,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:03,984 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:26:03,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:03,991 INFO L85 PathProgramCache]: Analyzing trace with hash 567305786, now seen corresponding path program 1 times [2021-11-02 22:26:04,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:04,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770324205] [2021-11-02 22:26:04,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:04,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:04,271 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 22:26:04,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:04,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770324205] [2021-11-02 22:26:04,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770324205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:26:04,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:26:04,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:26:04,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257018296] [2021-11-02 22:26:04,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:26:04,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:26:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:26:04,322 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:13,964 INFO L93 Difference]: Finished difference Result 4992 states and 9449 transitions. [2021-11-02 22:26:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:26:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 22:26:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:14,014 INFO L225 Difference]: With dead ends: 4992 [2021-11-02 22:26:14,014 INFO L226 Difference]: Without dead ends: 3180 [2021-11-02 22:26:14,026 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 22:26:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-11-02 22:26:14,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 3122. [2021-11-02 22:26:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 1.7282922140339634) internal successors, (5394), 3121 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states 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 22:26:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 5394 transitions. [2021-11-02 22:26:14,222 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 5394 transitions. Word has length 18 [2021-11-02 22:26:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:14,222 INFO L470 AbstractCegarLoop]: Abstraction has 3122 states and 5394 transitions. [2021-11-02 22:26:14,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 5394 transitions. [2021-11-02 22:26:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:26:14,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:14,227 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:26:14,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:26:14,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:14,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1163817322, now seen corresponding path program 1 times [2021-11-02 22:26:14,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:14,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430637009] [2021-11-02 22:26:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:14,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:14,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:14,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430637009] [2021-11-02 22:26:14,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430637009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:26:14,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:26:14,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:26:14,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421778841] [2021-11-02 22:26:14,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:26:14,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:26:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:26:14,418 INFO L87 Difference]: Start difference. First operand 3122 states and 5394 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:23,832 INFO L93 Difference]: Finished difference Result 9135 states and 15860 transitions. [2021-11-02 22:26:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:26:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-02 22:26:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:23,872 INFO L225 Difference]: With dead ends: 9135 [2021-11-02 22:26:23,872 INFO L226 Difference]: Without dead ends: 6015 [2021-11-02 22:26:23,877 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 22:26:23,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2021-11-02 22:26:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 6013. [2021-11-02 22:26:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6013 states, 6012 states have (on average 1.6708250166333998) internal successors, (10045), 6012 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states 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 22:26:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 10045 transitions. [2021-11-02 22:26:24,040 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 10045 transitions. Word has length 86 [2021-11-02 22:26:24,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:24,041 INFO L470 AbstractCegarLoop]: Abstraction has 6013 states and 10045 transitions. [2021-11-02 22:26:24,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 10045 transitions. [2021-11-02 22:26:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:26:24,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:24,053 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:26:24,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:26:24,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:24,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1002020165, now seen corresponding path program 1 times [2021-11-02 22:26:24,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:24,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250640829] [2021-11-02 22:26:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:24,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:24,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:24,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250640829] [2021-11-02 22:26:24,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250640829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:26:24,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:26:24,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:26:24,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581488911] [2021-11-02 22:26:24,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:26:24,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:26:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:26:24,175 INFO L87 Difference]: Start difference. First operand 6013 states and 10045 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:32,034 INFO L93 Difference]: Finished difference Result 17598 states and 29555 transitions. [2021-11-02 22:26:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:26:32,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-02 22:26:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:32,112 INFO L225 Difference]: With dead ends: 17598 [2021-11-02 22:26:32,112 INFO L226 Difference]: Without dead ends: 11587 [2021-11-02 22:26:32,122 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 22:26:32,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11587 states. [2021-11-02 22:26:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11587 to 11552. [2021-11-02 22:26:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11552 states, 11551 states have (on average 1.4577092892390269) internal successors, (16838), 11551 states have internal predecessors, (16838), 0 states have call successors, (0), 0 states 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 22:26:32,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11552 states to 11552 states and 16838 transitions. [2021-11-02 22:26:32,472 INFO L78 Accepts]: Start accepts. Automaton has 11552 states and 16838 transitions. Word has length 89 [2021-11-02 22:26:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:32,474 INFO L470 AbstractCegarLoop]: Abstraction has 11552 states and 16838 transitions. [2021-11-02 22:26:32,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:26:32,475 INFO L276 IsEmpty]: Start isEmpty. Operand 11552 states and 16838 transitions. [2021-11-02 22:26:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 22:26:32,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:32,480 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:26:32,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:26:32,481 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1347274474, now seen corresponding path program 1 times [2021-11-02 22:26:32,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:32,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831010392] [2021-11-02 22:26:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:32,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:26:32,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:32,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831010392] [2021-11-02 22:26:32,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831010392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:26:32,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:26:32,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:26:32,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502325967] [2021-11-02 22:26:32,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:26:32,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:32,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:26:32,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:26:32,658 INFO L87 Difference]: Start difference. First operand 11552 states and 16838 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 22:26:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:40,532 INFO L93 Difference]: Finished difference Result 34262 states and 50007 transitions. [2021-11-02 22:26:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:26:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-11-02 22:26:40,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:40,616 INFO L225 Difference]: With dead ends: 34262 [2021-11-02 22:26:40,616 INFO L226 Difference]: Without dead ends: 22712 [2021-11-02 22:26:40,635 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 22:26:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22712 states. [2021-11-02 22:26:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22712 to 22687. [2021-11-02 22:26:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22687 states, 22686 states have (on average 1.2819359957683152) internal successors, (29082), 22686 states have internal predecessors, (29082), 0 states have call successors, (0), 0 states 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 22:26:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22687 states to 22687 states and 29082 transitions. [2021-11-02 22:26:41,354 INFO L78 Accepts]: Start accepts. Automaton has 22687 states and 29082 transitions. Word has length 115 [2021-11-02 22:26:41,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:41,356 INFO L470 AbstractCegarLoop]: Abstraction has 22687 states and 29082 transitions. [2021-11-02 22:26:41,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 22:26:41,357 INFO L276 IsEmpty]: Start isEmpty. Operand 22687 states and 29082 transitions. [2021-11-02 22:26:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2021-11-02 22:26:41,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:41,373 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:41,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:26:41,373 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash -213281938, now seen corresponding path program 1 times [2021-11-02 22:26:41,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:41,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813106716] [2021-11-02 22:26:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:41,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 22:26:41,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:41,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813106716] [2021-11-02 22:26:41,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813106716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:26:41,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:26:41,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:26:41,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581013498] [2021-11-02 22:26:41,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:26:41,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:26:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:26:41,793 INFO L87 Difference]: Start difference. First operand 22687 states and 29082 transitions. Second operand has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:26:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:26:52,841 INFO L93 Difference]: Finished difference Result 57744 states and 72061 transitions. [2021-11-02 22:26:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:26:52,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 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 397 [2021-11-02 22:26:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:26:52,918 INFO L225 Difference]: With dead ends: 57744 [2021-11-02 22:26:52,919 INFO L226 Difference]: Without dead ends: 35059 [2021-11-02 22:26:52,944 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 22:26:52,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35059 states. [2021-11-02 22:26:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35059 to 33649. [2021-11-02 22:26:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33649 states, 33648 states have (on average 1.226254160722777) internal successors, (41261), 33648 states have internal predecessors, (41261), 0 states have call successors, (0), 0 states 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 22:26:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33649 states to 33649 states and 41261 transitions. [2021-11-02 22:26:53,534 INFO L78 Accepts]: Start accepts. Automaton has 33649 states and 41261 transitions. Word has length 397 [2021-11-02 22:26:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:26:53,535 INFO L470 AbstractCegarLoop]: Abstraction has 33649 states and 41261 transitions. [2021-11-02 22:26:53,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.5) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 22:26:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 33649 states and 41261 transitions. [2021-11-02 22:26:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2021-11-02 22:26:53,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:26:53,555 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:26:53,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:26:53,555 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:26:53,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:26:53,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1632408561, now seen corresponding path program 1 times [2021-11-02 22:26:53,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:26:53,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228834744] [2021-11-02 22:26:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:26:53,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:26:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:26:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-02 22:26:53,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:26:53,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228834744] [2021-11-02 22:26:53,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228834744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:26:53,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:26:53,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:26:53,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853740746] [2021-11-02 22:26:53,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:26:53,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:26:53,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:26:53,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:26:53,978 INFO L87 Difference]: Start difference. First operand 33649 states and 41261 transitions. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states 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 22:27:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:05,347 INFO L93 Difference]: Finished difference Result 90600 states and 108578 transitions. [2021-11-02 22:27:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 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 604 [2021-11-02 22:27:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:05,460 INFO L225 Difference]: With dead ends: 90600 [2021-11-02 22:27:05,461 INFO L226 Difference]: Without dead ends: 56953 [2021-11-02 22:27:05,491 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 22:27:05,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56953 states. [2021-11-02 22:27:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56953 to 52814. [2021-11-02 22:27:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52814 states, 52813 states have (on average 1.1741995342055933) internal successors, (62013), 52813 states have internal predecessors, (62013), 0 states have call successors, (0), 0 states 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 22:27:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52814 states to 52814 states and 62013 transitions. [2021-11-02 22:27:06,290 INFO L78 Accepts]: Start accepts. Automaton has 52814 states and 62013 transitions. Word has length 604 [2021-11-02 22:27:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:06,291 INFO L470 AbstractCegarLoop]: Abstraction has 52814 states and 62013 transitions. [2021-11-02 22:27:06,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states 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 22:27:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 52814 states and 62013 transitions. [2021-11-02 22:27:06,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2021-11-02 22:27:06,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:06,313 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 22:27:06,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:27:06,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:06,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1658091147, now seen corresponding path program 1 times [2021-11-02 22:27:06,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:06,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687895712] [2021-11-02 22:27:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:06,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-02 22:27:06,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687895712] [2021-11-02 22:27:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687895712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:06,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:06,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:27:06,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238941471] [2021-11-02 22:27:06,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:06,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:06,693 INFO L87 Difference]: Start difference. First operand 52814 states and 62013 transitions. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 22:27:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:14,483 INFO L93 Difference]: Finished difference Result 108387 states and 126803 transitions. [2021-11-02 22:27:14,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 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 632 [2021-11-02 22:27:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:14,683 INFO L225 Difference]: With dead ends: 108387 [2021-11-02 22:27:14,683 INFO L226 Difference]: Without dead ends: 55544 [2021-11-02 22:27:14,739 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 22:27:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55544 states. [2021-11-02 22:27:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55544 to 55544. [2021-11-02 22:27:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55544 states, 55543 states have (on average 1.1657274544046954) internal successors, (64748), 55543 states have internal predecessors, (64748), 0 states have call successors, (0), 0 states 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 22:27:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55544 states to 55544 states and 64748 transitions. [2021-11-02 22:27:15,780 INFO L78 Accepts]: Start accepts. Automaton has 55544 states and 64748 transitions. Word has length 632 [2021-11-02 22:27:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:15,781 INFO L470 AbstractCegarLoop]: Abstraction has 55544 states and 64748 transitions. [2021-11-02 22:27:15,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states 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 22:27:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 55544 states and 64748 transitions. [2021-11-02 22:27:15,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2021-11-02 22:27:15,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:15,811 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:15,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:27:15,811 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash 708835332, now seen corresponding path program 1 times [2021-11-02 22:27:15,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:15,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647280104] [2021-11-02 22:27:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:15,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-02 22:27:16,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:16,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647280104] [2021-11-02 22:27:16,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647280104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:16,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:16,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:16,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811816645] [2021-11-02 22:27:16,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:16,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:16,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:16,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:16,501 INFO L87 Difference]: Start difference. First operand 55544 states and 64748 transitions. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 22:27:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:30,806 INFO L93 Difference]: Finished difference Result 170144 states and 202228 transitions. [2021-11-02 22:27:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:30,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 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 717 [2021-11-02 22:27:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:31,060 INFO L225 Difference]: With dead ends: 170144 [2021-11-02 22:27:31,061 INFO L226 Difference]: Without dead ends: 117332 [2021-11-02 22:27:31,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117332 states. [2021-11-02 22:27:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117332 to 117158. [2021-11-02 22:27:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117158 states, 117157 states have (on average 1.1595978046552917) internal successors, (135855), 117157 states have internal predecessors, (135855), 0 states have call successors, (0), 0 states 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 22:27:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117158 states to 117158 states and 135855 transitions. [2021-11-02 22:27:33,294 INFO L78 Accepts]: Start accepts. Automaton has 117158 states and 135855 transitions. Word has length 717 [2021-11-02 22:27:33,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:33,296 INFO L470 AbstractCegarLoop]: Abstraction has 117158 states and 135855 transitions. [2021-11-02 22:27:33,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 22:27:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 117158 states and 135855 transitions. [2021-11-02 22:27:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2021-11-02 22:27:33,328 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:33,329 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:33,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:27:33,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash 781992777, now seen corresponding path program 1 times [2021-11-02 22:27:33,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:33,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83662198] [2021-11-02 22:27:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:33,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 31 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:34,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:34,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83662198] [2021-11-02 22:27:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83662198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:34,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258951341] [2021-11-02 22:27:34,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:34,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:34,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:34,504 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:34,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:27:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:34,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:27:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-11-02 22:27:36,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258951341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:36,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:27:36,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-11-02 22:27:36,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913408765] [2021-11-02 22:27:36,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:27:36,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:27:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:36,847 INFO L87 Difference]: Start difference. First operand 117158 states and 135855 transitions. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 22:27:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:46,369 INFO L93 Difference]: Finished difference Result 324432 states and 378302 transitions. [2021-11-02 22:27:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:27:46,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 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 724 [2021-11-02 22:27:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:46,648 INFO L225 Difference]: With dead ends: 324432 [2021-11-02 22:27:46,648 INFO L226 Difference]: Without dead ends: 210006 [2021-11-02 22:27:46,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210006 states. [2021-11-02 22:27:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210006 to 192224. [2021-11-02 22:27:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192224 states, 192223 states have (on average 1.1480988227215265) internal successors, (220691), 192223 states have internal predecessors, (220691), 0 states have call successors, (0), 0 states 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 22:27:50,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192224 states to 192224 states and 220691 transitions. [2021-11-02 22:27:50,426 INFO L78 Accepts]: Start accepts. Automaton has 192224 states and 220691 transitions. Word has length 724 [2021-11-02 22:27:50,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:50,449 INFO L470 AbstractCegarLoop]: Abstraction has 192224 states and 220691 transitions. [2021-11-02 22:27:50,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states 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 22:27:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 192224 states and 220691 transitions. [2021-11-02 22:27:50,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2021-11-02 22:27:50,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:50,479 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:27:50,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:50,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68034a8f-c4de-4126-a433-709a9c78ff8e/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:50,698 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:27:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1502142038, now seen corresponding path program 1 times [2021-11-02 22:27:50,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:50,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039261889] [2021-11-02 22:27:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:50,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-02 22:27:51,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:51,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039261889] [2021-11-02 22:27:51,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039261889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:51,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:51,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:27:51,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525048000] [2021-11-02 22:27:51,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:27:51,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:27:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:27:51,240 INFO L87 Difference]: Start difference. First operand 192224 states and 220691 transitions. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 2 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 22:28:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:00,579 INFO L93 Difference]: Finished difference Result 441816 states and 508701 transitions. [2021-11-02 22:28:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:00,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 2 states have internal predecessors, (589), 0 states have call successors, (0), 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 835 [2021-11-02 22:28:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:00,938 INFO L225 Difference]: With dead ends: 441816 [2021-11-02 22:28:00,938 INFO L226 Difference]: Without dead ends: 252324 [2021-11-02 22:28:01,043 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 22:28:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252324 states. [2021-11-02 22:28:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252324 to 245472. [2021-11-02 22:28:04,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245472 states, 245471 states have (on average 1.13410545441213) internal successors, (278390), 245471 states have internal predecessors, (278390), 0 states have call successors, (0), 0 states 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 22:28:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245472 states to 245472 states and 278390 transitions. [2021-11-02 22:28:05,163 INFO L78 Accepts]: Start accepts. Automaton has 245472 states and 278390 transitions. Word has length 835 [2021-11-02 22:28:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:05,164 INFO L470 AbstractCegarLoop]: Abstraction has 245472 states and 278390 transitions. [2021-11-02 22:28:05,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 2 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 22:28:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 245472 states and 278390 transitions. [2021-11-02 22:28:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2021-11-02 22:28:05,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:05,191 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:05,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:28:05,192 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash -806784425, now seen corresponding path program 1 times [2021-11-02 22:28:05,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:05,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924355032] [2021-11-02 22:28:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:05,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-02 22:28:05,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:05,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924355032] [2021-11-02 22:28:05,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924355032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:05,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:05,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:28:05,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443273683] [2021-11-02 22:28:05,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:28:05,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:28:05,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:05,736 INFO L87 Difference]: Start difference. First operand 245472 states and 278390 transitions. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 22:28:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:16,836 INFO L93 Difference]: Finished difference Result 579818 states and 662310 transitions. [2021-11-02 22:28:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:16,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 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 877 [2021-11-02 22:28:16,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:17,332 INFO L225 Difference]: With dead ends: 579818 [2021-11-02 22:28:17,333 INFO L226 Difference]: Without dead ends: 337078 [2021-11-02 22:28:17,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 22:28:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337078 states. [2021-11-02 22:28:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337078 to 323269. [2021-11-02 22:28:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323269 states, 323268 states have (on average 1.1487032431295396) internal successors, (371339), 323268 states have internal predecessors, (371339), 0 states have call successors, (0), 0 states 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 22:28:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323269 states to 323269 states and 371339 transitions. [2021-11-02 22:28:23,124 INFO L78 Accepts]: Start accepts. Automaton has 323269 states and 371339 transitions. Word has length 877 [2021-11-02 22:28:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:23,125 INFO L470 AbstractCegarLoop]: Abstraction has 323269 states and 371339 transitions. [2021-11-02 22:28:23,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 22:28:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 323269 states and 371339 transitions. [2021-11-02 22:28:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 896 [2021-11-02 22:28:23,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:23,140 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:23,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:28:23,140 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:28:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash -473328309, now seen corresponding path program 1 times [2021-11-02 22:28:23,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:23,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951513210] [2021-11-02 22:28:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:23,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-02 22:28:23,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:23,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951513210] [2021-11-02 22:28:23,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951513210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:28:23,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:28:23,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:28:23,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917017440] [2021-11-02 22:28:23,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:28:23,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:28:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:28:23,618 INFO L87 Difference]: Start difference. First operand 323269 states and 371339 transitions. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states 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 22:28:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:34,714 INFO L93 Difference]: Finished difference Result 702511 states and 812907 transitions. [2021-11-02 22:28:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:28:34,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 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 895 [2021-11-02 22:28:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:35,233 INFO L225 Difference]: With dead ends: 702511 [2021-11-02 22:28:35,234 INFO L226 Difference]: Without dead ends: 381974 [2021-11-02 22:28:35,363 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 22:28:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381974 states.