./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF --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 46a91366e7e569e141300a988c04d8b4b481c1b05b44f766484efcdaa4c30cac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:53:47,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:53:47,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:53:47,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:53:47,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:53:47,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:53:47,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:53:47,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:53:47,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:53:47,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:53:47,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:53:47,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:53:47,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:53:47,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:53:47,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:53:48,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:53:48,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:53:48,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:53:48,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:53:48,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:53:48,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:53:48,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:53:48,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:53:48,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:53:48,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:53:48,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:53:48,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:53:48,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:53:48,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:53:48,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:53:48,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:53:48,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:53:48,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:53:48,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:53:48,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:53:48,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:53:48,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:53:48,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:53:48,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:53:48,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:53:48,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:53:48,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:53:48,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:53:48,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:53:48,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:53:48,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:53:48,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:53:48,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:53:48,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:53:48,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:53:48,075 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:53:48,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:53:48,077 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:53:48,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:53:48,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:53:48,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:53:48,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:53:48,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:53:48,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:53:48,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:53:48,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:53:48,079 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:53:48,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:53:48,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:53:48,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:53:48,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:53:48,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:53:48,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:53:48,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:53:48,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:53:48,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:53:48,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:53:48,081 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:53:48,082 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:53:48,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:53:48,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:53:48,082 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_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46a91366e7e569e141300a988c04d8b4b481c1b05b44f766484efcdaa4c30cac [2021-11-20 06:53:48,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:53:48,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:53:48,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:53:48,383 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:53:48,384 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:53:48,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2021-11-20 06:53:48,468 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/data/7c466ceb3/9348d70dbf4242fd9b1f86d9f930fc11/FLAGb17c71893 [2021-11-20 06:53:49,021 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:53:49,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2021-11-20 06:53:49,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/data/7c466ceb3/9348d70dbf4242fd9b1f86d9f930fc11/FLAGb17c71893 [2021-11-20 06:53:49,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/data/7c466ceb3/9348d70dbf4242fd9b1f86d9f930fc11 [2021-11-20 06:53:49,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:53:49,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:53:49,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:53:49,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:53:49,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:53:49,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:53:49" (1/1) ... [2021-11-20 06:53:49,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db83f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:49, skipping insertion in model container [2021-11-20 06:53:49,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:53:49" (1/1) ... [2021-11-20 06:53:49,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:53:49,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:53:49,883 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c[28368,28381] [2021-11-20 06:53:49,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:53:49,905 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:53:50,040 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c[28368,28381] [2021-11-20 06:53:50,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:53:50,063 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:53:50,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50 WrapperNode [2021-11-20 06:53:50,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:53:50,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:53:50,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:53:50,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:53:50,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,189 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 952 [2021-11-20 06:53:50,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:53:50,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:53:50,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:53:50,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:53:50,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:53:50,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:53:50,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:53:50,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:53:50,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (1/1) ... [2021-11-20 06:53:50,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:53:50,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:53:50,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:53:50,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_510c89bd-bb89-4490-bcd2-94c0d3989386/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:53:50,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:53:50,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:53:50,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:53:50,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:53:50,516 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:53:50,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:53:51,587 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:53:51,600 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:53:51,601 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:53:51,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:53:51 BoogieIcfgContainer [2021-11-20 06:53:51,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:53:51,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:53:51,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:53:51,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:53:51,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:53:49" (1/3) ... [2021-11-20 06:53:51,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17929e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:53:51, skipping insertion in model container [2021-11-20 06:53:51,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:53:50" (2/3) ... [2021-11-20 06:53:51,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17929e4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:53:51, skipping insertion in model container [2021-11-20 06:53:51,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:53:51" (3/3) ... [2021-11-20 06:53:51,612 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c [2021-11-20 06:53:51,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:53:51,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:53:51,664 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:53:51,671 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 [2021-11-20 06:53:51,672 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:53:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 310 states have (on average 1.8) internal successors, (558), 311 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 06:53:51,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:51,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:51,713 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:51,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:51,718 INFO L85 PathProgramCache]: Analyzing trace with hash 883240596, now seen corresponding path program 1 times [2021-11-20 06:53:51,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:51,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43098578] [2021-11-20 06:53:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:51,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:52,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:52,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43098578] [2021-11-20 06:53:52,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43098578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:52,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:52,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:53:52,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41496414] [2021-11-20 06:53:52,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:52,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:53:52,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:52,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:53:52,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:53:52,175 INFO L87 Difference]: Start difference. First operand has 312 states, 310 states have (on average 1.8) internal successors, (558), 311 states have internal predecessors, (558), 0 states have call successors, (0), 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 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:52,220 INFO L93 Difference]: Finished difference Result 429 states and 759 transitions. [2021-11-20 06:53:52,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:53:52,223 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 06:53:52,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:52,237 INFO L225 Difference]: With dead ends: 429 [2021-11-20 06:53:52,238 INFO L226 Difference]: Without dead ends: 308 [2021-11-20 06:53:52,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:53:52,245 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:52,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-20 06:53:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-11-20 06:53:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.794788273615635) internal successors, (551), 307 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 551 transitions. [2021-11-20 06:53:52,325 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 551 transitions. Word has length 77 [2021-11-20 06:53:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:52,326 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 551 transitions. [2021-11-20 06:53:52,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 551 transitions. [2021-11-20 06:53:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 06:53:52,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:52,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:52,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:53:52,332 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 749227090, now seen corresponding path program 1 times [2021-11-20 06:53:52,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:52,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420002034] [2021-11-20 06:53:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:52,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:52,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420002034] [2021-11-20 06:53:52,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420002034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:52,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:52,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:53:52,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915630831] [2021-11-20 06:53:52,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:52,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:53:52,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:53:52,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:53:52,587 INFO L87 Difference]: Start difference. First operand 308 states and 551 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:52,737 INFO L93 Difference]: Finished difference Result 428 states and 752 transitions. [2021-11-20 06:53:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:53:52,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-20 06:53:52,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:52,758 INFO L225 Difference]: With dead ends: 428 [2021-11-20 06:53:52,758 INFO L226 Difference]: Without dead ends: 308 [2021-11-20 06:53:52,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:53:52,760 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 3 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:52,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2151 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:53:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-20 06:53:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-11-20 06:53:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.6579804560260587) internal successors, (509), 307 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 509 transitions. [2021-11-20 06:53:52,776 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 509 transitions. Word has length 77 [2021-11-20 06:53:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:52,777 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 509 transitions. [2021-11-20 06:53:52,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:52,777 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 509 transitions. [2021-11-20 06:53:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:53:52,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:52,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:52,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:53:52,784 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1045938854, now seen corresponding path program 1 times [2021-11-20 06:53:52,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:52,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429395232] [2021-11-20 06:53:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:52,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:52,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:52,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429395232] [2021-11-20 06:53:52,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429395232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:52,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:52,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:53:52,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91828001] [2021-11-20 06:53:52,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:52,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:53:52,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:53:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:52,965 INFO L87 Difference]: Start difference. First operand 308 states and 509 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:53,039 INFO L93 Difference]: Finished difference Result 529 states and 882 transitions. [2021-11-20 06:53:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:53:53,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-20 06:53:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:53,062 INFO L225 Difference]: With dead ends: 529 [2021-11-20 06:53:53,062 INFO L226 Difference]: Without dead ends: 413 [2021-11-20 06:53:53,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:53,065 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 167 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:53,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 959 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:53:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-20 06:53:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2021-11-20 06:53:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.6552567237163813) internal successors, (677), 409 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 677 transitions. [2021-11-20 06:53:53,112 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 677 transitions. Word has length 118 [2021-11-20 06:53:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:53,113 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 677 transitions. [2021-11-20 06:53:53,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,113 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 677 transitions. [2021-11-20 06:53:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-20 06:53:53,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:53,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:53,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:53:53,121 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1919052267, now seen corresponding path program 1 times [2021-11-20 06:53:53,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:53,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017487946] [2021-11-20 06:53:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:53,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:53,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:53,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017487946] [2021-11-20 06:53:53,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017487946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:53,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:53,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:53:53,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424502534] [2021-11-20 06:53:53,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:53,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:53:53,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:53:53,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:53,249 INFO L87 Difference]: Start difference. First operand 410 states and 677 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:53,286 INFO L93 Difference]: Finished difference Result 828 states and 1373 transitions. [2021-11-20 06:53:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:53:53,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-20 06:53:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:53,291 INFO L225 Difference]: With dead ends: 828 [2021-11-20 06:53:53,291 INFO L226 Difference]: Without dead ends: 610 [2021-11-20 06:53:53,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:53,307 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 168 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:53,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 971 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-20 06:53:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 606. [2021-11-20 06:53:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.6545454545454545) internal successors, (1001), 605 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1001 transitions. [2021-11-20 06:53:53,357 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1001 transitions. Word has length 121 [2021-11-20 06:53:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:53,358 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1001 transitions. [2021-11-20 06:53:53,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1001 transitions. [2021-11-20 06:53:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:53:53,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:53,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:53,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:53:53,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:53,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1777448074, now seen corresponding path program 1 times [2021-11-20 06:53:53,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:53,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538258561] [2021-11-20 06:53:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:53,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:53,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:53,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538258561] [2021-11-20 06:53:53,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538258561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:53,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:53,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:53:53,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340842188] [2021-11-20 06:53:53,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:53,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:53:53,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:53,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:53:53,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:53,539 INFO L87 Difference]: Start difference. First operand 606 states and 1001 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:53,594 INFO L93 Difference]: Finished difference Result 1398 states and 2311 transitions. [2021-11-20 06:53:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:53:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-20 06:53:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:53,602 INFO L225 Difference]: With dead ends: 1398 [2021-11-20 06:53:53,603 INFO L226 Difference]: Without dead ends: 984 [2021-11-20 06:53:53,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:53,610 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 161 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:53,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 972 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-11-20 06:53:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 978. [2021-11-20 06:53:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 1.646878198567042) internal successors, (1609), 977 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1609 transitions. [2021-11-20 06:53:53,660 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1609 transitions. Word has length 124 [2021-11-20 06:53:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:53,661 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1609 transitions. [2021-11-20 06:53:53,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1609 transitions. [2021-11-20 06:53:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-20 06:53:53,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:53,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:53,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:53:53,678 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:53,680 INFO L85 PathProgramCache]: Analyzing trace with hash 78545669, now seen corresponding path program 1 times [2021-11-20 06:53:53,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:53,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329220126] [2021-11-20 06:53:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:53,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:53,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:53,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329220126] [2021-11-20 06:53:53,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329220126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:53,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:53,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:53:53,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565981801] [2021-11-20 06:53:53,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:53,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:53:53,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:53,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:53:53,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:53,794 INFO L87 Difference]: Start difference. First operand 978 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:53,848 INFO L93 Difference]: Finished difference Result 2478 states and 4067 transitions. [2021-11-20 06:53:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:53:53,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-20 06:53:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:53,859 INFO L225 Difference]: With dead ends: 2478 [2021-11-20 06:53:53,859 INFO L226 Difference]: Without dead ends: 1692 [2021-11-20 06:53:53,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:53,863 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 154 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:53,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 973 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-11-20 06:53:53,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1682. [2021-11-20 06:53:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 1.6329565734681737) internal successors, (2745), 1681 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2745 transitions. [2021-11-20 06:53:53,950 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2745 transitions. Word has length 127 [2021-11-20 06:53:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:53,950 INFO L470 AbstractCegarLoop]: Abstraction has 1682 states and 2745 transitions. [2021-11-20 06:53:53,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2745 transitions. [2021-11-20 06:53:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-20 06:53:53,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:53,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:53,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:53:53,954 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash -579836998, now seen corresponding path program 1 times [2021-11-20 06:53:53,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:53,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675396354] [2021-11-20 06:53:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:53,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:54,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:54,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675396354] [2021-11-20 06:53:54,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675396354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:54,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:54,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:53:54,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177740261] [2021-11-20 06:53:54,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:54,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:53:54,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:54,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:53:54,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:53:54,073 INFO L87 Difference]: Start difference. First operand 1682 states and 2745 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:54,558 INFO L93 Difference]: Finished difference Result 8642 states and 14261 transitions. [2021-11-20 06:53:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:53:54,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-20 06:53:54,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:54,609 INFO L225 Difference]: With dead ends: 8642 [2021-11-20 06:53:54,609 INFO L226 Difference]: Without dead ends: 7152 [2021-11-20 06:53:54,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:53:54,616 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 1536 mSDsluCounter, 4056 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 4567 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:54,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 4567 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:53:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2021-11-20 06:53:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 3070. [2021-11-20 06:53:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 3069 states have (on average 1.632453567937439) internal successors, (5010), 3069 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 5010 transitions. [2021-11-20 06:53:54,807 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 5010 transitions. Word has length 130 [2021-11-20 06:53:54,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:54,808 INFO L470 AbstractCegarLoop]: Abstraction has 3070 states and 5010 transitions. [2021-11-20 06:53:54,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 5010 transitions. [2021-11-20 06:53:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-20 06:53:54,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:54,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:54,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:53:54,813 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1405282905, now seen corresponding path program 1 times [2021-11-20 06:53:54,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:54,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086710251] [2021-11-20 06:53:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:54,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:54,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:54,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086710251] [2021-11-20 06:53:54,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086710251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:54,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:54,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:53:54,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626661680] [2021-11-20 06:53:54,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:54,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:53:54,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:53:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:53:54,894 INFO L87 Difference]: Start difference. First operand 3070 states and 5010 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:55,114 INFO L93 Difference]: Finished difference Result 8952 states and 14718 transitions. [2021-11-20 06:53:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:53:55,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-20 06:53:55,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:55,152 INFO L225 Difference]: With dead ends: 8952 [2021-11-20 06:53:55,152 INFO L226 Difference]: Without dead ends: 6074 [2021-11-20 06:53:55,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:53:55,158 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 565 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:55,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1655 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:53:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6074 states. [2021-11-20 06:53:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6074 to 4555. [2021-11-20 06:53:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 1.636802810715854) internal successors, (7454), 4554 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 7454 transitions. [2021-11-20 06:53:55,394 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 7454 transitions. Word has length 131 [2021-11-20 06:53:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:55,395 INFO L470 AbstractCegarLoop]: Abstraction has 4555 states and 7454 transitions. [2021-11-20 06:53:55,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 7454 transitions. [2021-11-20 06:53:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-20 06:53:55,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:55,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:55,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:53:55,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1311505199, now seen corresponding path program 1 times [2021-11-20 06:53:55,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265630905] [2021-11-20 06:53:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:55,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:55,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265630905] [2021-11-20 06:53:55,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265630905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:55,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:55,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:53:55,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558637405] [2021-11-20 06:53:55,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:55,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:53:55,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:53:55,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:53:55,517 INFO L87 Difference]: Start difference. First operand 4555 states and 7454 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:55,787 INFO L93 Difference]: Finished difference Result 13332 states and 21904 transitions. [2021-11-20 06:53:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:53:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-20 06:53:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:55,852 INFO L225 Difference]: With dead ends: 13332 [2021-11-20 06:53:55,852 INFO L226 Difference]: Without dead ends: 8969 [2021-11-20 06:53:55,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:53:55,862 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 565 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:55,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1645 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8969 states. [2021-11-20 06:53:56,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8969 to 6738. [2021-11-20 06:53:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 1.6355944782544158) internal successors, (11019), 6737 states have internal predecessors, (11019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 11019 transitions. [2021-11-20 06:53:56,252 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 11019 transitions. Word has length 132 [2021-11-20 06:53:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:56,253 INFO L470 AbstractCegarLoop]: Abstraction has 6738 states and 11019 transitions. [2021-11-20 06:53:56,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 11019 transitions. [2021-11-20 06:53:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:53:56,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:56,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:56,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:53:56,260 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:56,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:56,260 INFO L85 PathProgramCache]: Analyzing trace with hash -547474472, now seen corresponding path program 1 times [2021-11-20 06:53:56,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:56,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418181690] [2021-11-20 06:53:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:56,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:56,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:56,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418181690] [2021-11-20 06:53:56,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418181690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:56,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:56,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:53:56,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45289796] [2021-11-20 06:53:56,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:56,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:53:56,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:56,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:53:56,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:56,330 INFO L87 Difference]: Start difference. First operand 6738 states and 11019 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:56,601 INFO L93 Difference]: Finished difference Result 14989 states and 24645 transitions. [2021-11-20 06:53:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:53:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 06:53:56,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:56,624 INFO L225 Difference]: With dead ends: 14989 [2021-11-20 06:53:56,624 INFO L226 Difference]: Without dead ends: 10369 [2021-11-20 06:53:56,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:56,633 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 174 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:56,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 1133 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2021-11-20 06:53:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10367. [2021-11-20 06:53:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10367 states, 10366 states have (on average 1.6335134092224581) internal successors, (16933), 10366 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10367 states to 10367 states and 16933 transitions. [2021-11-20 06:53:57,072 INFO L78 Accepts]: Start accepts. Automaton has 10367 states and 16933 transitions. Word has length 133 [2021-11-20 06:53:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:57,073 INFO L470 AbstractCegarLoop]: Abstraction has 10367 states and 16933 transitions. [2021-11-20 06:53:57,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:57,073 INFO L276 IsEmpty]: Start isEmpty. Operand 10367 states and 16933 transitions. [2021-11-20 06:53:57,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:53:57,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:57,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:57,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:53:57,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1576389218, now seen corresponding path program 1 times [2021-11-20 06:53:57,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:57,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870752170] [2021-11-20 06:53:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:57,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:57,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:57,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870752170] [2021-11-20 06:53:57,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870752170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:57,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:57,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:53:57,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270178756] [2021-11-20 06:53:57,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:57,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:53:57,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:53:57,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:57,137 INFO L87 Difference]: Start difference. First operand 10367 states and 16933 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:57,639 INFO L93 Difference]: Finished difference Result 22920 states and 37484 transitions. [2021-11-20 06:53:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:53:57,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 06:53:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:57,678 INFO L225 Difference]: With dead ends: 22920 [2021-11-20 06:53:57,679 INFO L226 Difference]: Without dead ends: 15821 [2021-11-20 06:53:57,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:57,693 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 167 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:57,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1123 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15821 states. [2021-11-20 06:53:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15821 to 15819. [2021-11-20 06:53:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15819 states, 15818 states have (on average 1.6255531672777848) internal successors, (25713), 15818 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15819 states to 15819 states and 25713 transitions. [2021-11-20 06:53:58,303 INFO L78 Accepts]: Start accepts. Automaton has 15819 states and 25713 transitions. Word has length 133 [2021-11-20 06:53:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:53:58,303 INFO L470 AbstractCegarLoop]: Abstraction has 15819 states and 25713 transitions. [2021-11-20 06:53:58,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 15819 states and 25713 transitions. [2021-11-20 06:53:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:53:58,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:53:58,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:53:58,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:53:58,307 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:53:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:53:58,308 INFO L85 PathProgramCache]: Analyzing trace with hash 721034008, now seen corresponding path program 1 times [2021-11-20 06:53:58,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:53:58,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217874042] [2021-11-20 06:53:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:53:58,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:53:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:53:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:53:58,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:53:58,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217874042] [2021-11-20 06:53:58,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217874042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:53:58,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:53:58,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:53:58,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909863086] [2021-11-20 06:53:58,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:53:58,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:53:58,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:53:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:53:58,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:58,367 INFO L87 Difference]: Start difference. First operand 15819 states and 25713 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:53:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:53:59,028 INFO L93 Difference]: Finished difference Result 30877 states and 50296 transitions. [2021-11-20 06:53:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:53:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 06:53:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:53:59,074 INFO L225 Difference]: With dead ends: 30877 [2021-11-20 06:53:59,075 INFO L226 Difference]: Without dead ends: 22254 [2021-11-20 06:53:59,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:53:59,087 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 160 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:53:59,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1106 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:53:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22254 states. [2021-11-20 06:53:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22254 to 22252. [2021-11-20 06:53:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22252 states, 22251 states have (on average 1.6184441148712418) internal successors, (36012), 22251 states have internal predecessors, (36012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22252 states to 22252 states and 36012 transitions. [2021-11-20 06:54:00,037 INFO L78 Accepts]: Start accepts. Automaton has 22252 states and 36012 transitions. Word has length 133 [2021-11-20 06:54:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:00,037 INFO L470 AbstractCegarLoop]: Abstraction has 22252 states and 36012 transitions. [2021-11-20 06:54:00,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 22252 states and 36012 transitions. [2021-11-20 06:54:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:54:00,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:00,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:00,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:54:00,041 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:00,041 INFO L85 PathProgramCache]: Analyzing trace with hash 536413840, now seen corresponding path program 1 times [2021-11-20 06:54:00,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:00,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038811003] [2021-11-20 06:54:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:00,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:00,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038811003] [2021-11-20 06:54:00,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038811003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:00,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:00,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:00,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115347995] [2021-11-20 06:54:00,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:00,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:00,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:00,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:00,140 INFO L87 Difference]: Start difference. First operand 22252 states and 36012 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:01,556 INFO L93 Difference]: Finished difference Result 71884 states and 116652 transitions. [2021-11-20 06:54:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 06:54:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:01,686 INFO L225 Difference]: With dead ends: 71884 [2021-11-20 06:54:01,687 INFO L226 Difference]: Without dead ends: 49852 [2021-11-20 06:54:01,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:01,721 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 563 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:01,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 1647 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:01,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49852 states. [2021-11-20 06:54:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49852 to 35959. [2021-11-20 06:54:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35959 states, 35958 states have (on average 1.6142722064630959) internal successors, (58046), 35958 states have internal predecessors, (58046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35959 states to 35959 states and 58046 transitions. [2021-11-20 06:54:03,293 INFO L78 Accepts]: Start accepts. Automaton has 35959 states and 58046 transitions. Word has length 133 [2021-11-20 06:54:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:03,293 INFO L470 AbstractCegarLoop]: Abstraction has 35959 states and 58046 transitions. [2021-11-20 06:54:03,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 35959 states and 58046 transitions. [2021-11-20 06:54:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:54:03,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:03,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:03,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:54:03,296 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:03,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1673295070, now seen corresponding path program 1 times [2021-11-20 06:54:03,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:03,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279089774] [2021-11-20 06:54:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:03,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:03,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:03,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279089774] [2021-11-20 06:54:03,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279089774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:03,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:03,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:54:03,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144696511] [2021-11-20 06:54:03,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:03,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:54:03,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:54:03,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:03,382 INFO L87 Difference]: Start difference. First operand 35959 states and 58046 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:04,793 INFO L93 Difference]: Finished difference Result 70577 states and 114169 transitions. [2021-11-20 06:54:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:54:04,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-20 06:54:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:04,962 INFO L225 Difference]: With dead ends: 70577 [2021-11-20 06:54:04,963 INFO L226 Difference]: Without dead ends: 50524 [2021-11-20 06:54:05,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:54:05,002 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 153 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:05,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1088 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50524 states. [2021-11-20 06:54:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50524 to 50522. [2021-11-20 06:54:06,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50522 states, 50521 states have (on average 1.605569961006314) internal successors, (81115), 50521 states have internal predecessors, (81115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50522 states to 50522 states and 81115 transitions. [2021-11-20 06:54:07,125 INFO L78 Accepts]: Start accepts. Automaton has 50522 states and 81115 transitions. Word has length 133 [2021-11-20 06:54:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:07,125 INFO L470 AbstractCegarLoop]: Abstraction has 50522 states and 81115 transitions. [2021-11-20 06:54:07,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 50522 states and 81115 transitions. [2021-11-20 06:54:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-20 06:54:07,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:07,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:07,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:54:07,129 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2138633752, now seen corresponding path program 1 times [2021-11-20 06:54:07,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515541282] [2021-11-20 06:54:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:07,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:07,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:07,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515541282] [2021-11-20 06:54:07,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515541282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:07,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:07,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:54:07,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693837893] [2021-11-20 06:54:07,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:07,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:54:07,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:54:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:54:07,227 INFO L87 Difference]: Start difference. First operand 50522 states and 81115 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:09,896 INFO L93 Difference]: Finished difference Result 162671 states and 261879 transitions. [2021-11-20 06:54:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:54:09,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-20 06:54:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:10,184 INFO L225 Difference]: With dead ends: 162671 [2021-11-20 06:54:10,184 INFO L226 Difference]: Without dead ends: 112382 [2021-11-20 06:54:10,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:10,246 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 561 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:10,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1632 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112382 states. [2021-11-20 06:54:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112382 to 81227. [2021-11-20 06:54:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 1.6005835569891413) internal successors, (130009), 81226 states have internal predecessors, (130009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 130009 transitions. [2021-11-20 06:54:12,936 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 130009 transitions. Word has length 134 [2021-11-20 06:54:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:12,937 INFO L470 AbstractCegarLoop]: Abstraction has 81227 states and 130009 transitions. [2021-11-20 06:54:12,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 130009 transitions. [2021-11-20 06:54:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-20 06:54:12,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:12,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:12,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:54:12,940 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash -153851200, now seen corresponding path program 1 times [2021-11-20 06:54:12,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:12,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342832337] [2021-11-20 06:54:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:12,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:13,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:13,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342832337] [2021-11-20 06:54:13,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342832337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:13,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:13,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:54:13,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433500715] [2021-11-20 06:54:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:13,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:54:13,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:54:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:54:13,151 INFO L87 Difference]: Start difference. First operand 81227 states and 130009 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:15,785 INFO L93 Difference]: Finished difference Result 162223 states and 259648 transitions. [2021-11-20 06:54:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:54:15,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-20 06:54:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:16,000 INFO L225 Difference]: With dead ends: 162223 [2021-11-20 06:54:16,000 INFO L226 Difference]: Without dead ends: 81229 [2021-11-20 06:54:16,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:54:16,030 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 457 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:16,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1925 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81229 states. [2021-11-20 06:54:17,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81229 to 81227. [2021-11-20 06:54:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 1.5928889764361165) internal successors, (129384), 81226 states have internal predecessors, (129384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 129384 transitions. [2021-11-20 06:54:18,167 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 129384 transitions. Word has length 136 [2021-11-20 06:54:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:18,168 INFO L470 AbstractCegarLoop]: Abstraction has 81227 states and 129384 transitions. [2021-11-20 06:54:18,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 129384 transitions. [2021-11-20 06:54:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-20 06:54:18,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:18,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:18,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:54:18,171 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1698314093, now seen corresponding path program 1 times [2021-11-20 06:54:18,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:18,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022288459] [2021-11-20 06:54:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:18,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:18,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:18,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022288459] [2021-11-20 06:54:18,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022288459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:18,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:18,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:54:18,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041569024] [2021-11-20 06:54:18,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:18,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:54:18,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:18,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:54:18,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:54:18,333 INFO L87 Difference]: Start difference. First operand 81227 states and 129384 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:21,983 INFO L93 Difference]: Finished difference Result 237501 states and 378780 transitions. [2021-11-20 06:54:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:54:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-20 06:54:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:22,234 INFO L225 Difference]: With dead ends: 237501 [2021-11-20 06:54:22,234 INFO L226 Difference]: Without dead ends: 156507 [2021-11-20 06:54:22,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:54:22,291 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 756 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:22,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1934 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:54:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156507 states. [2021-11-20 06:54:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156507 to 156505. [2021-11-20 06:54:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156505 states, 156504 states have (on average 1.5830202422941266) internal successors, (247749), 156504 states have internal predecessors, (247749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156505 states to 156505 states and 247749 transitions. [2021-11-20 06:54:27,023 INFO L78 Accepts]: Start accepts. Automaton has 156505 states and 247749 transitions. Word has length 139 [2021-11-20 06:54:27,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:54:27,024 INFO L470 AbstractCegarLoop]: Abstraction has 156505 states and 247749 transitions. [2021-11-20 06:54:27,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:27,024 INFO L276 IsEmpty]: Start isEmpty. Operand 156505 states and 247749 transitions. [2021-11-20 06:54:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:54:27,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:54:27,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:54:27,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:54:27,027 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:54:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:54:27,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1539474647, now seen corresponding path program 1 times [2021-11-20 06:54:27,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:54:27,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908195183] [2021-11-20 06:54:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:54:27,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:54:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:54:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:54:27,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:54:27,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908195183] [2021-11-20 06:54:27,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908195183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:54:27,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:54:27,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:54:27,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461860214] [2021-11-20 06:54:27,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:54:27,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:54:27,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:54:27,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:54:27,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:54:27,190 INFO L87 Difference]: Start difference. First operand 156505 states and 247749 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:54:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:54:34,048 INFO L93 Difference]: Finished difference Result 302832 states and 475525 transitions. [2021-11-20 06:54:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:54:34,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-20 06:54:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:54:34,587 INFO L225 Difference]: With dead ends: 302832 [2021-11-20 06:54:34,587 INFO L226 Difference]: Without dead ends: 302830 [2021-11-20 06:54:34,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:54:34,645 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 529 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:54:34,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 2132 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:54:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302830 states.