./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label13.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_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/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_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/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_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/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 152d7fbf05854462a33897c88f7cf73fa78514058a292c6dd4eaf2d74f1b44e9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:19:46,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:19:46,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:19:47,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:19:47,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:19:47,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:19:47,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:19:47,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:19:47,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:19:47,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:19:47,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:19:47,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:19:47,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:19:47,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:19:47,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:19:47,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:19:47,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:19:47,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:19:47,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:19:47,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:19:47,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:19:47,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:19:47,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:19:47,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:19:47,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:19:47,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:19:47,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:19:47,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:19:47,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:19:47,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:19:47,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:19:47,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:19:47,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:19:47,083 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:19:47,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:19:47,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:19:47,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:19:47,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:19:47,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:19:47,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:19:47,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:19:47,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:19:47,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:19:47,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:19:47,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:19:47,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:19:47,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:19:47,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:19:47,127 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:19:47,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:19:47,128 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:19:47,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:19:47,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:19:47,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:19:47,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:19:47,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:19:47,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:19:47,130 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:19:47,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:19:47,131 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:19:47,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:19:47,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:19:47,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:19:47,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:19:47,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:47,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:19:47,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:19:47,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:19:47,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:19:47,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:19:47,134 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:19:47,135 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:19:47,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:19:47,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:19:47,136 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_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 152d7fbf05854462a33897c88f7cf73fa78514058a292c6dd4eaf2d74f1b44e9 [2021-11-02 22:19:47,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:19:47,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:19:47,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:19:47,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:19:47,558 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:19:47,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/eca-rers2012/Problem12_label13.c [2021-11-02 22:19:47,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/data/8eeb6ce75/64b53afb4f55422e96c9e42ed0895ffd/FLAGe81234b01 [2021-11-02 22:19:48,680 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:19:48,682 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/sv-benchmarks/c/eca-rers2012/Problem12_label13.c [2021-11-02 22:19:48,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/data/8eeb6ce75/64b53afb4f55422e96c9e42ed0895ffd/FLAGe81234b01 [2021-11-02 22:19:49,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/data/8eeb6ce75/64b53afb4f55422e96c9e42ed0895ffd [2021-11-02 22:19:49,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:19:49,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:19:49,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:49,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:19:49,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:19:49,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:49" (1/1) ... [2021-11-02 22:19:49,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad25688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:49, skipping insertion in model container [2021-11-02 22:19:49,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:49" (1/1) ... [2021-11-02 22:19:49,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:19:49,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:19:49,720 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_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/sv-benchmarks/c/eca-rers2012/Problem12_label13.c[3765,3778] [2021-11-02 22:19:51,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:51,154 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:19:51,200 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_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/sv-benchmarks/c/eca-rers2012/Problem12_label13.c[3765,3778] [2021-11-02 22:19:52,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:52,114 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:19:52,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52 WrapperNode [2021-11-02 22:19:52,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:52,117 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:52,117 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:19:52,117 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:19:52,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:52,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:52,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:52,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:19:52,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:19:52,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:19:52,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:52,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:52,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:52,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:53,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:53,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:53,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:53,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:19:53,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:19:53,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:19:53,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:19:53,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (1/1) ... [2021-11-02 22:19:53,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:53,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:53,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:19:53,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:19:53,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:19:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:19:53,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:19:53,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:20:00,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:20:00,168 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-02 22:20:00,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:00 BoogieIcfgContainer [2021-11-02 22:20:00,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:20:00,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:20:00,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:20:00,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:20:00,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:19:49" (1/3) ... [2021-11-02 22:20:00,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69838955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:20:00, skipping insertion in model container [2021-11-02 22:20:00,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:52" (2/3) ... [2021-11-02 22:20:00,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69838955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:20:00, skipping insertion in model container [2021-11-02 22:20:00,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:00" (3/3) ... [2021-11-02 22:20:00,188 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label13.c [2021-11-02 22:20:00,200 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:20:00,200 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:20:00,291 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:20:00,303 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 22:20:00,304 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:20:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:20:00,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:00,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:00,371 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2021-11-02 22:20:00,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:00,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715201329] [2021-11-02 22:20:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:00,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:00,709 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 22:20:00,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:00,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715201329] [2021-11-02 22:20:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715201329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:00,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:00,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:20:00,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842555263] [2021-11-02 22:20:00,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:00,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:00,751 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:07,018 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-11-02 22:20:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:07,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 22:20:07,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:07,065 INFO L225 Difference]: With dead ends: 2388 [2021-11-02 22:20:07,065 INFO L226 Difference]: Without dead ends: 1506 [2021-11-02 22:20:07,077 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 22:20:07,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-02 22:20:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-02 22:20:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.869767441860465) internal successors, (2814), 1505 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states 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 22:20:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2814 transitions. [2021-11-02 22:20:07,255 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2814 transitions. Word has length 28 [2021-11-02 22:20:07,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:07,256 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2814 transitions. [2021-11-02 22:20:07,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2814 transitions. [2021-11-02 22:20:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-02 22:20:07,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:07,266 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:20:07,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:20:07,267 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash 574416204, now seen corresponding path program 1 times [2021-11-02 22:20:07,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:07,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80156003] [2021-11-02 22:20:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:07,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:07,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:07,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80156003] [2021-11-02 22:20:07,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80156003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:07,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:07,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:20:07,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599987446] [2021-11-02 22:20:07,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:07,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:07,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:07,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:07,530 INFO L87 Difference]: Start difference. First operand 1506 states and 2814 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:12,350 INFO L93 Difference]: Finished difference Result 4514 states and 8438 transitions. [2021-11-02 22:20:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:12,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-02 22:20:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:12,376 INFO L225 Difference]: With dead ends: 4514 [2021-11-02 22:20:12,377 INFO L226 Difference]: Without dead ends: 3010 [2021-11-02 22:20:12,381 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 22:20:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2021-11-02 22:20:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2021-11-02 22:20:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.6531426671100764) internal successors, (4971), 3007 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states 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 22:20:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4971 transitions. [2021-11-02 22:20:12,572 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4971 transitions. Word has length 101 [2021-11-02 22:20:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:12,573 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4971 transitions. [2021-11-02 22:20:12,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:12,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4971 transitions. [2021-11-02 22:20:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 22:20:12,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:12,584 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:20:12,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:20:12,586 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1742777415, now seen corresponding path program 1 times [2021-11-02 22:20:12,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:12,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545995296] [2021-11-02 22:20:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:12,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:12,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:12,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545995296] [2021-11-02 22:20:12,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545995296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:12,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:12,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:12,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786595364] [2021-11-02 22:20:12,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:12,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:20:12,799 INFO L87 Difference]: Start difference. First operand 3008 states and 4971 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:20,336 INFO L93 Difference]: Finished difference Result 8267 states and 13429 transitions. [2021-11-02 22:20:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:20:20,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-02 22:20:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:20,377 INFO L225 Difference]: With dead ends: 8267 [2021-11-02 22:20:20,378 INFO L226 Difference]: Without dead ends: 5261 [2021-11-02 22:20:20,382 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 22:20:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-11-02 22:20:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-11-02 22:20:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.5102661596958176) internal successors, (7944), 5260 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states 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 22:20:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7944 transitions. [2021-11-02 22:20:20,538 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7944 transitions. Word has length 114 [2021-11-02 22:20:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:20,540 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 7944 transitions. [2021-11-02 22:20:20,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7944 transitions. [2021-11-02 22:20:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-02 22:20:20,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:20,550 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:20:20,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:20:20,550 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1340876962, now seen corresponding path program 1 times [2021-11-02 22:20:20,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:20,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028717592] [2021-11-02 22:20:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:20,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:20:20,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:20,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028717592] [2021-11-02 22:20:20,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028717592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:20,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62961398] [2021-11-02 22:20:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:20,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:20,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:20,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:20:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:20:20,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-02 22:20:21,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62961398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:21,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:21,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-02 22:20:21,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383174171] [2021-11-02 22:20:21,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:21,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:21,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:21,840 INFO L87 Difference]: Start difference. First operand 5261 states and 7944 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:25,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:25,956 INFO L93 Difference]: Finished difference Result 14275 states and 22313 transitions. [2021-11-02 22:20:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-02 22:20:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:26,023 INFO L225 Difference]: With dead ends: 14275 [2021-11-02 22:20:26,023 INFO L226 Difference]: Without dead ends: 9767 [2021-11-02 22:20:26,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-11-02 22:20:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-11-02 22:20:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3878763055498669) internal successors, (13554), 9766 states have internal predecessors, (13554), 0 states have call successors, (0), 0 states 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 22:20:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13554 transitions. [2021-11-02 22:20:26,413 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13554 transitions. Word has length 169 [2021-11-02 22:20:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:26,415 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 13554 transitions. [2021-11-02 22:20:26,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13554 transitions. [2021-11-02 22:20:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-02 22:20:26,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:26,421 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:20:26,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:26,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:26,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash 355454358, now seen corresponding path program 1 times [2021-11-02 22:20:26,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:26,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034081511] [2021-11-02 22:20:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:26,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:26,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:26,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034081511] [2021-11-02 22:20:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034081511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:26,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:26,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:26,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458984971] [2021-11-02 22:20:26,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:26,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:26,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:20:26,893 INFO L87 Difference]: Start difference. First operand 9767 states and 13554 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:31,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:31,320 INFO L93 Difference]: Finished difference Result 23326 states and 32178 transitions. [2021-11-02 22:20:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:20:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-02 22:20:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:31,397 INFO L225 Difference]: With dead ends: 23326 [2021-11-02 22:20:31,397 INFO L226 Difference]: Without dead ends: 14275 [2021-11-02 22:20:31,410 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 22:20:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2021-11-02 22:20:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 14273. [2021-11-02 22:20:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 1.2780269058295963) internal successors, (18240), 14272 states have internal predecessors, (18240), 0 states have call successors, (0), 0 states 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 22:20:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 18240 transitions. [2021-11-02 22:20:31,777 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 18240 transitions. Word has length 185 [2021-11-02 22:20:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:31,778 INFO L470 AbstractCegarLoop]: Abstraction has 14273 states and 18240 transitions. [2021-11-02 22:20:31,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 18240 transitions. [2021-11-02 22:20:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-02 22:20:31,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:31,785 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:20:31,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:20:31,785 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:31,787 INFO L85 PathProgramCache]: Analyzing trace with hash 875379101, now seen corresponding path program 1 times [2021-11-02 22:20:31,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:31,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224166273] [2021-11-02 22:20:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:31,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-02 22:20:31,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:31,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224166273] [2021-11-02 22:20:31,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224166273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:31,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:31,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:31,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341427427] [2021-11-02 22:20:31,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:31,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:32,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:32,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:32,000 INFO L87 Difference]: Start difference. First operand 14273 states and 18240 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 22:20:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:36,160 INFO L93 Difference]: Finished difference Result 34552 states and 45269 transitions. [2021-11-02 22:20:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-11-02 22:20:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:36,218 INFO L225 Difference]: With dead ends: 34552 [2021-11-02 22:20:36,219 INFO L226 Difference]: Without dead ends: 21032 [2021-11-02 22:20:36,236 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 22:20:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2021-11-02 22:20:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 20281. [2021-11-02 22:20:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20281 states, 20280 states have (on average 1.2444773175542407) internal successors, (25238), 20280 states have internal predecessors, (25238), 0 states have call successors, (0), 0 states 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 22:20:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20281 states to 20281 states and 25238 transitions. [2021-11-02 22:20:36,635 INFO L78 Accepts]: Start accepts. Automaton has 20281 states and 25238 transitions. Word has length 259 [2021-11-02 22:20:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:36,636 INFO L470 AbstractCegarLoop]: Abstraction has 20281 states and 25238 transitions. [2021-11-02 22:20:36,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 22:20:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 20281 states and 25238 transitions. [2021-11-02 22:20:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-02 22:20:36,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:36,644 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:20:36,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:20:36,645 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:36,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:36,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2101162795, now seen corresponding path program 1 times [2021-11-02 22:20:36,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:36,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592036024] [2021-11-02 22:20:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:36,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-02 22:20:36,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:36,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592036024] [2021-11-02 22:20:36,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592036024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:36,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:36,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:36,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144941460] [2021-11-02 22:20:36,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:36,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:36,837 INFO L87 Difference]: Start difference. First operand 20281 states and 25238 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 22:20:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:41,406 INFO L93 Difference]: Finished difference Result 56331 states and 71005 transitions. [2021-11-02 22:20:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:41,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-11-02 22:20:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:41,501 INFO L225 Difference]: With dead ends: 56331 [2021-11-02 22:20:41,501 INFO L226 Difference]: Without dead ends: 36803 [2021-11-02 22:20:41,526 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 22:20:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36803 states. [2021-11-02 22:20:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36803 to 33799. [2021-11-02 22:20:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33799 states, 33798 states have (on average 1.2420853304929287) internal successors, (41980), 33798 states have internal predecessors, (41980), 0 states have call successors, (0), 0 states 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 22:20:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33799 states to 33799 states and 41980 transitions. [2021-11-02 22:20:42,152 INFO L78 Accepts]: Start accepts. Automaton has 33799 states and 41980 transitions. Word has length 268 [2021-11-02 22:20:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:42,153 INFO L470 AbstractCegarLoop]: Abstraction has 33799 states and 41980 transitions. [2021-11-02 22:20:42,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 22:20:42,153 INFO L276 IsEmpty]: Start isEmpty. Operand 33799 states and 41980 transitions. [2021-11-02 22:20:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-02 22:20:42,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:42,163 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:20:42,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:20:42,164 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:42,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:42,165 INFO L85 PathProgramCache]: Analyzing trace with hash -700037012, now seen corresponding path program 1 times [2021-11-02 22:20:42,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:42,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055421374] [2021-11-02 22:20:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:42,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-02 22:20:42,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:42,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055421374] [2021-11-02 22:20:42,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055421374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:42,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:42,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:20:42,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337457668] [2021-11-02 22:20:42,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:42,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:42,367 INFO L87 Difference]: Start difference. First operand 33799 states and 41980 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:46,578 INFO L93 Difference]: Finished difference Result 69849 states and 86532 transitions. [2021-11-02 22:20:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 317 [2021-11-02 22:20:46,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:46,655 INFO L225 Difference]: With dead ends: 69849 [2021-11-02 22:20:46,656 INFO L226 Difference]: Without dead ends: 36803 [2021-11-02 22:20:46,682 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 22:20:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36803 states. [2021-11-02 22:20:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36803 to 31546. [2021-11-02 22:20:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31546 states, 31545 states have (on average 1.1562529719448407) internal successors, (36474), 31545 states have internal predecessors, (36474), 0 states have call successors, (0), 0 states 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 22:20:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31546 states to 31546 states and 36474 transitions. [2021-11-02 22:20:47,636 INFO L78 Accepts]: Start accepts. Automaton has 31546 states and 36474 transitions. Word has length 317 [2021-11-02 22:20:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:47,637 INFO L470 AbstractCegarLoop]: Abstraction has 31546 states and 36474 transitions. [2021-11-02 22:20:47,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:47,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31546 states and 36474 transitions. [2021-11-02 22:20:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2021-11-02 22:20:47,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:47,654 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:47,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:20:47,655 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1199580277, now seen corresponding path program 1 times [2021-11-02 22:20:47,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:47,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050050596] [2021-11-02 22:20:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:47,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-02 22:20:47,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:47,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050050596] [2021-11-02 22:20:47,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050050596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:47,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:47,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:47,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528581664] [2021-11-02 22:20:47,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:47,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:47,975 INFO L87 Difference]: Start difference. First operand 31546 states and 36474 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 22:20:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:51,699 INFO L93 Difference]: Finished difference Result 64592 states and 74523 transitions. [2021-11-02 22:20:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:51,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 416 [2021-11-02 22:20:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:51,777 INFO L225 Difference]: With dead ends: 64592 [2021-11-02 22:20:51,778 INFO L226 Difference]: Without dead ends: 33799 [2021-11-02 22:20:51,795 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 22:20:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33799 states. [2021-11-02 22:20:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33799 to 31546. [2021-11-02 22:20:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31546 states, 31545 states have (on average 1.127119987319702) internal successors, (35555), 31545 states have internal predecessors, (35555), 0 states have call successors, (0), 0 states 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 22:20:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31546 states to 31546 states and 35555 transitions. [2021-11-02 22:20:52,472 INFO L78 Accepts]: Start accepts. Automaton has 31546 states and 35555 transitions. Word has length 416 [2021-11-02 22:20:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:52,473 INFO L470 AbstractCegarLoop]: Abstraction has 31546 states and 35555 transitions. [2021-11-02 22:20:52,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 22:20:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 31546 states and 35555 transitions. [2021-11-02 22:20:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-11-02 22:20:52,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:52,500 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:52,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:20:52,501 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1965759442, now seen corresponding path program 1 times [2021-11-02 22:20:52,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:52,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016091957] [2021-11-02 22:20:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:52,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-02 22:20:52,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:52,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016091957] [2021-11-02 22:20:52,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016091957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:52,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:52,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:52,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816236480] [2021-11-02 22:20:52,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:52,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:52,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:52,742 INFO L87 Difference]: Start difference. First operand 31546 states and 35555 transitions. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 22:20:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:57,219 INFO L93 Difference]: Finished difference Result 65343 states and 73461 transitions. [2021-11-02 22:20:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:57,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 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 430 [2021-11-02 22:20:57,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:57,331 INFO L225 Difference]: With dead ends: 65343 [2021-11-02 22:20:57,331 INFO L226 Difference]: Without dead ends: 34550 [2021-11-02 22:20:57,342 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 22:20:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-11-02 22:20:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 33048. [2021-11-02 22:20:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33048 states, 33047 states have (on average 1.115956062577541) internal successors, (36879), 33047 states have internal predecessors, (36879), 0 states have call successors, (0), 0 states 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 22:20:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33048 states to 33048 states and 36879 transitions. [2021-11-02 22:20:57,953 INFO L78 Accepts]: Start accepts. Automaton has 33048 states and 36879 transitions. Word has length 430 [2021-11-02 22:20:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:57,953 INFO L470 AbstractCegarLoop]: Abstraction has 33048 states and 36879 transitions. [2021-11-02 22:20:57,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states 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 22:20:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33048 states and 36879 transitions. [2021-11-02 22:20:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-02 22:20:57,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:57,967 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:57,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:20:57,968 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:57,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:57,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1910124132, now seen corresponding path program 1 times [2021-11-02 22:20:57,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:57,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545864014] [2021-11-02 22:20:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:57,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 118 proven. 257 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-02 22:20:58,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:58,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545864014] [2021-11-02 22:20:58,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545864014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:58,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462446103] [2021-11-02 22:20:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:58,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:58,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:58,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:20:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:58,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:20:58,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-02 22:20:59,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462446103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:59,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:59,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-02 22:20:59,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40242823] [2021-11-02 22:20:59,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:59,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:59,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:20:59,962 INFO L87 Difference]: Start difference. First operand 33048 states and 36879 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 22:21:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:03,580 INFO L93 Difference]: Finished difference Result 75106 states and 83663 transitions. [2021-11-02 22:21:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 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 434 [2021-11-02 22:21:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:03,643 INFO L225 Difference]: With dead ends: 75106 [2021-11-02 22:21:03,643 INFO L226 Difference]: Without dead ends: 42811 [2021-11-02 22:21:03,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42811 states. [2021-11-02 22:21:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42811 to 39807. [2021-11-02 22:21:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39807 states, 39806 states have (on average 1.1089283022659902) internal successors, (44142), 39806 states have internal predecessors, (44142), 0 states have call successors, (0), 0 states 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 22:21:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39807 states to 39807 states and 44142 transitions. [2021-11-02 22:21:04,458 INFO L78 Accepts]: Start accepts. Automaton has 39807 states and 44142 transitions. Word has length 434 [2021-11-02 22:21:04,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:04,459 INFO L470 AbstractCegarLoop]: Abstraction has 39807 states and 44142 transitions. [2021-11-02 22:21:04,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states 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 22:21:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 39807 states and 44142 transitions. [2021-11-02 22:21:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-02 22:21:04,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:04,474 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-02 22:21:04,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:04,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:21:04,688 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:04,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash -2035727835, now seen corresponding path program 1 times [2021-11-02 22:21:04,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:04,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784891482] [2021-11-02 22:21:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:04,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 482 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-02 22:21:04,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:04,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784891482] [2021-11-02 22:21:04,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784891482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:04,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:04,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:04,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525786847] [2021-11-02 22:21:04,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:21:04,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:04,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:21:04,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:21:04,892 INFO L87 Difference]: Start difference. First operand 39807 states and 44142 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 22:21:08,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:08,943 INFO L93 Difference]: Finished difference Result 94632 states and 105967 transitions. [2021-11-02 22:21:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 442 [2021-11-02 22:21:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:09,113 INFO L225 Difference]: With dead ends: 94632 [2021-11-02 22:21:09,113 INFO L226 Difference]: Without dead ends: 55578 [2021-11-02 22:21:09,130 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 22:21:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55578 states. [2021-11-02 22:21:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55578 to 54827. [2021-11-02 22:21:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54827 states, 54826 states have (on average 1.0967606610002554) internal successors, (60131), 54826 states have internal predecessors, (60131), 0 states have call successors, (0), 0 states 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 22:21:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54827 states to 54827 states and 60131 transitions. [2021-11-02 22:21:09,902 INFO L78 Accepts]: Start accepts. Automaton has 54827 states and 60131 transitions. Word has length 442 [2021-11-02 22:21:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:09,903 INFO L470 AbstractCegarLoop]: Abstraction has 54827 states and 60131 transitions. [2021-11-02 22:21:09,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 22:21:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 54827 states and 60131 transitions. [2021-11-02 22:21:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-02 22:21:09,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:09,921 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:09,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:21:09,922 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1694848555, now seen corresponding path program 1 times [2021-11-02 22:21:09,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:09,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783042296] [2021-11-02 22:21:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:09,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 401 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-02 22:21:10,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:10,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783042296] [2021-11-02 22:21:10,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783042296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:10,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:10,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:10,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630998603] [2021-11-02 22:21:10,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:21:10,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:21:10,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:21:10,399 INFO L87 Difference]: Start difference. First operand 54827 states and 60131 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:13,820 INFO L93 Difference]: Finished difference Result 111154 states and 121817 transitions. [2021-11-02 22:21:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:13,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2021-11-02 22:21:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:14,013 INFO L225 Difference]: With dead ends: 111154 [2021-11-02 22:21:14,013 INFO L226 Difference]: Without dead ends: 54076 [2021-11-02 22:21:14,038 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 22:21:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54076 states. [2021-11-02 22:21:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54076 to 52574. [2021-11-02 22:21:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52574 states, 52573 states have (on average 1.0778726722842524) internal successors, (56667), 52573 states have internal predecessors, (56667), 0 states have call successors, (0), 0 states 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 22:21:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52574 states to 52574 states and 56667 transitions. [2021-11-02 22:21:14,812 INFO L78 Accepts]: Start accepts. Automaton has 52574 states and 56667 transitions. Word has length 474 [2021-11-02 22:21:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:14,813 INFO L470 AbstractCegarLoop]: Abstraction has 52574 states and 56667 transitions. [2021-11-02 22:21:14,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 52574 states and 56667 transitions. [2021-11-02 22:21:14,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-11-02 22:21:14,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:14,833 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:21:14,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:21:14,834 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:14,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1778876796, now seen corresponding path program 1 times [2021-11-02 22:21:14,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:14,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400163758] [2021-11-02 22:21:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:14,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-02 22:21:15,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:15,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400163758] [2021-11-02 22:21:15,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400163758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:15,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:15,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418600104] [2021-11-02 22:21:15,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:21:15,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:21:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:21:15,057 INFO L87 Difference]: Start difference. First operand 52574 states and 56667 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:18,327 INFO L93 Difference]: Finished difference Result 118664 states and 128154 transitions. [2021-11-02 22:21:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:18,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 519 [2021-11-02 22:21:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:18,576 INFO L225 Difference]: With dead ends: 118664 [2021-11-02 22:21:18,577 INFO L226 Difference]: Without dead ends: 66843 [2021-11-02 22:21:18,596 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 22:21:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66843 states. [2021-11-02 22:21:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66843 to 62337. [2021-11-02 22:21:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62337 states, 62336 states have (on average 1.0721894250513346) internal successors, (66836), 62336 states have internal predecessors, (66836), 0 states have call successors, (0), 0 states 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 22:21:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62337 states to 62337 states and 66836 transitions. [2021-11-02 22:21:19,476 INFO L78 Accepts]: Start accepts. Automaton has 62337 states and 66836 transitions. Word has length 519 [2021-11-02 22:21:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:19,477 INFO L470 AbstractCegarLoop]: Abstraction has 62337 states and 66836 transitions. [2021-11-02 22:21:19,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:21:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 62337 states and 66836 transitions. [2021-11-02 22:21:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2021-11-02 22:21:19,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:19,507 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-11-02 22:21:19,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:21:19,508 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:19,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -974235098, now seen corresponding path program 1 times [2021-11-02 22:21:19,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:19,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46645539] [2021-11-02 22:21:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:19,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 631 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-11-02 22:21:19,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:19,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46645539] [2021-11-02 22:21:19,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46645539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:19,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:19,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:19,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302969519] [2021-11-02 22:21:19,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:21:19,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:21:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:21:19,812 INFO L87 Difference]: Start difference. First operand 62337 states and 66836 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states 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 22:21:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:23,871 INFO L93 Difference]: Finished difference Result 139692 states and 150981 transitions. [2021-11-02 22:21:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:23,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 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 599 [2021-11-02 22:21:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:23,965 INFO L225 Difference]: With dead ends: 139692 [2021-11-02 22:21:23,965 INFO L226 Difference]: Without dead ends: 78108 [2021-11-02 22:21:23,995 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 22:21:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78108 states. [2021-11-02 22:21:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78108 to 78108. [2021-11-02 22:21:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78108 states, 78107 states have (on average 1.0788405648661452) internal successors, (84265), 78107 states have internal predecessors, (84265), 0 states have call successors, (0), 0 states 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 22:21:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78108 states to 78108 states and 84265 transitions. [2021-11-02 22:21:25,301 INFO L78 Accepts]: Start accepts. Automaton has 78108 states and 84265 transitions. Word has length 599 [2021-11-02 22:21:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:25,302 INFO L470 AbstractCegarLoop]: Abstraction has 78108 states and 84265 transitions. [2021-11-02 22:21:25,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states 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 22:21:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 78108 states and 84265 transitions. [2021-11-02 22:21:25,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2021-11-02 22:21:25,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:25,330 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-11-02 22:21:25,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:21:25,331 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1593961, now seen corresponding path program 1 times [2021-11-02 22:21:25,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:25,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662025114] [2021-11-02 22:21:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:25,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 888 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-02 22:21:25,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:25,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662025114] [2021-11-02 22:21:25,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662025114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:25,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:25,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:21:25,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334377548] [2021-11-02 22:21:25,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:21:25,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:21:25,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:25,863 INFO L87 Difference]: Start difference. First operand 78108 states and 84265 transitions. Second operand has 6 states, 6 states have (on average 108.16666666666667) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 22:21:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:34,442 INFO L93 Difference]: Finished difference Result 171482 states and 184964 transitions. [2021-11-02 22:21:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:21:34,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 108.16666666666667) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 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 674 [2021-11-02 22:21:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:34,550 INFO L225 Difference]: With dead ends: 171482 [2021-11-02 22:21:34,551 INFO L226 Difference]: Without dead ends: 94127 [2021-11-02 22:21:34,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:21:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94127 states. [2021-11-02 22:21:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94127 to 79610. [2021-11-02 22:21:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79610 states, 79609 states have (on average 1.0777801504854978) internal successors, (85801), 79609 states have internal predecessors, (85801), 0 states have call successors, (0), 0 states 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 22:21:35,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79610 states to 79610 states and 85801 transitions. [2021-11-02 22:21:35,708 INFO L78 Accepts]: Start accepts. Automaton has 79610 states and 85801 transitions. Word has length 674 [2021-11-02 22:21:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:35,709 INFO L470 AbstractCegarLoop]: Abstraction has 79610 states and 85801 transitions. [2021-11-02 22:21:35,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.16666666666667) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 22:21:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 79610 states and 85801 transitions. [2021-11-02 22:21:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 698 [2021-11-02 22:21:35,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:35,731 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-11-02 22:21:35,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:21:35,732 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:35,732 INFO L85 PathProgramCache]: Analyzing trace with hash 876374999, now seen corresponding path program 1 times [2021-11-02 22:21:35,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:35,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067330209] [2021-11-02 22:21:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:35,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 818 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-02 22:21:36,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:36,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067330209] [2021-11-02 22:21:36,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067330209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:36,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:36,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:36,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926417134] [2021-11-02 22:21:36,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:21:36,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:21:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:21:36,106 INFO L87 Difference]: Start difference. First operand 79610 states and 85801 transitions. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 22:21:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:40,384 INFO L93 Difference]: Finished difference Result 171234 states and 184513 transitions. [2021-11-02 22:21:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 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 697 [2021-11-02 22:21:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:40,818 INFO L225 Difference]: With dead ends: 171234 [2021-11-02 22:21:40,818 INFO L226 Difference]: Without dead ends: 92377 [2021-11-02 22:21:40,861 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 22:21:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92377 states. [2021-11-02 22:21:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92377 to 91626. [2021-11-02 22:21:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91626 states, 91625 states have (on average 1.074237380627558) internal successors, (98427), 91625 states have internal predecessors, (98427), 0 states have call successors, (0), 0 states 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 22:21:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91626 states to 91626 states and 98427 transitions. [2021-11-02 22:21:42,315 INFO L78 Accepts]: Start accepts. Automaton has 91626 states and 98427 transitions. Word has length 697 [2021-11-02 22:21:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:42,315 INFO L470 AbstractCegarLoop]: Abstraction has 91626 states and 98427 transitions. [2021-11-02 22:21:42,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states 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 22:21:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 91626 states and 98427 transitions. [2021-11-02 22:21:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2021-11-02 22:21:42,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:42,337 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 22:21:42,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:21:42,338 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:42,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:42,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1568677755, now seen corresponding path program 1 times [2021-11-02 22:21:42,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:42,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470319584] [2021-11-02 22:21:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:42,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 720 proven. 0 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-02 22:21:42,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:42,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470319584] [2021-11-02 22:21:42,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470319584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:42,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:42,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:21:42,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946211904] [2021-11-02 22:21:42,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:21:42,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:42,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:21:42,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:21:42,648 INFO L87 Difference]: Start difference. First operand 91626 states and 98427 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 22:21:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:47,516 INFO L93 Difference]: Finished difference Result 239575 states and 257809 transitions. [2021-11-02 22:21:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:47,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 730 [2021-11-02 22:21:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:47,690 INFO L225 Difference]: With dead ends: 239575 [2021-11-02 22:21:47,690 INFO L226 Difference]: Without dead ends: 148702 [2021-11-02 22:21:47,734 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 22:21:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148702 states. [2021-11-02 22:21:49,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148702 to 143445. [2021-11-02 22:21:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143445 states, 143444 states have (on average 1.067573408438136) internal successors, (153137), 143444 states have internal predecessors, (153137), 0 states have call successors, (0), 0 states 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 22:21:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143445 states to 143445 states and 153137 transitions. [2021-11-02 22:21:50,249 INFO L78 Accepts]: Start accepts. Automaton has 143445 states and 153137 transitions. Word has length 730 [2021-11-02 22:21:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:50,250 INFO L470 AbstractCegarLoop]: Abstraction has 143445 states and 153137 transitions. [2021-11-02 22:21:50,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 22:21:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 143445 states and 153137 transitions. [2021-11-02 22:21:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2021-11-02 22:21:50,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:50,300 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:50,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:21:50,300 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:21:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:50,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1280313191, now seen corresponding path program 1 times [2021-11-02 22:21:50,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:21:50,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122094724] [2021-11-02 22:21:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:50,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:21:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 850 proven. 230 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-02 22:21:50,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:21:50,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122094724] [2021-11-02 22:21:50,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122094724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:21:50,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950407180] [2021-11-02 22:21:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:50,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:21:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:21:50,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:21:50,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:21:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:21:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 896 proven. 0 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-11-02 22:21:53,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950407180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:53,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:21:53,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-02 22:21:53,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633532038] [2021-11-02 22:21:53,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:21:53,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:21:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:21:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:21:53,513 INFO L87 Difference]: Start difference. First operand 143445 states and 153137 transitions. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 22:21:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:57,806 INFO L93 Difference]: Finished difference Result 286137 states and 305516 transitions. [2021-11-02 22:21:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:21:57,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 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 738 [2021-11-02 22:21:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:57,979 INFO L225 Difference]: With dead ends: 286137 [2021-11-02 22:21:57,979 INFO L226 Difference]: Without dead ends: 143445 [2021-11-02 22:21:58,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 737 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:21:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143445 states. [2021-11-02 22:22:00,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143445 to 129176. [2021-11-02 22:22:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129176 states, 129175 states have (on average 1.0499322624346816) internal successors, (135625), 129175 states have internal predecessors, (135625), 0 states have call successors, (0), 0 states 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 22:22:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129176 states to 129176 states and 135625 transitions. [2021-11-02 22:22:00,502 INFO L78 Accepts]: Start accepts. Automaton has 129176 states and 135625 transitions. Word has length 738 [2021-11-02 22:22:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:00,502 INFO L470 AbstractCegarLoop]: Abstraction has 129176 states and 135625 transitions. [2021-11-02 22:22:00,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states 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 22:22:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 129176 states and 135625 transitions. [2021-11-02 22:22:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2021-11-02 22:22:00,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:00,556 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:00,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:22:00,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28b0341-b2f1-4de9-8f6e-eab0ffcb4da4/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:22:00,773 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:00,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash -897354487, now seen corresponding path program 1 times [2021-11-02 22:22:00,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:00,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089269083] [2021-11-02 22:22:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:00,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 797 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-11-02 22:22:01,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:01,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089269083] [2021-11-02 22:22:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089269083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:01,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:01,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086453347] [2021-11-02 22:22:01,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:01,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:01,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:01,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:01,126 INFO L87 Difference]: Start difference. First operand 129176 states and 135625 transitions. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states 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 22:22:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:22:06,256 INFO L93 Difference]: Finished difference Result 291394 states and 306016 transitions. [2021-11-02 22:22:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:22:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 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 762 [2021-11-02 22:22:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:22:06,436 INFO L225 Difference]: With dead ends: 291394 [2021-11-02 22:22:06,436 INFO L226 Difference]: Without dead ends: 162971 [2021-11-02 22:22:06,488 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 22:22:06,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162971 states. [2021-11-02 22:22:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162971 to 156212. [2021-11-02 22:22:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156212 states, 156211 states have (on average 1.0443246634359937) internal successors, (163135), 156211 states have internal predecessors, (163135), 0 states have call successors, (0), 0 states 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 22:22:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156212 states to 156212 states and 163135 transitions. [2021-11-02 22:22:09,030 INFO L78 Accepts]: Start accepts. Automaton has 156212 states and 163135 transitions. Word has length 762 [2021-11-02 22:22:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:22:09,031 INFO L470 AbstractCegarLoop]: Abstraction has 156212 states and 163135 transitions. [2021-11-02 22:22:09,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states 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 22:22:09,031 INFO L276 IsEmpty]: Start isEmpty. Operand 156212 states and 163135 transitions. [2021-11-02 22:22:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 773 [2021-11-02 22:22:09,059 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:22:09,059 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:22:09,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:22:09,060 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:22:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:22:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -451339748, now seen corresponding path program 1 times [2021-11-02 22:22:09,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:22:09,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790579946] [2021-11-02 22:22:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:22:09,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:22:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:22:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 1013 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-02 22:22:09,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:09,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790579946] [2021-11-02 22:22:09,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790579946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:22:09,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:22:09,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:22:09,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644949777] [2021-11-02 22:22:09,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:22:09,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:22:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:22:09,341 INFO L87 Difference]: Start difference. First operand 156212 states and 163135 transitions. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)