./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a7994e4b0bfbe275d233e5a25c7b22888e2d55ba388328f1fc4435f77ac9412d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:19:55,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:19:55,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:19:55,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:19:55,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:19:55,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:19:55,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:19:55,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:19:55,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:19:55,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:19:55,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:19:55,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:19:55,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:19:55,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:19:55,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:19:55,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:19:55,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:19:55,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:19:56,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:19:56,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:19:56,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:19:56,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:19:56,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:19:56,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:19:56,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:19:56,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:19:56,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:19:56,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:19:56,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:19:56,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:19:56,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:19:56,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:19:56,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:19:56,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:19:56,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:19:56,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:19:56,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:19:56,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:19:56,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:19:56,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:19:56,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:19:56,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:19:56,052 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:19:56,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:19:56,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:19:56,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:19:56,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:19:56,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:19:56,058 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:19:56,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:19:56,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:19:56,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:19:56,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:19:56,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:19:56,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:19:56,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:19:56,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:19:56,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:19:56,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:19:56,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:19:56,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:19:56,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:19:56,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:19:56,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:19:56,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:56,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:19:56,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:19:56,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:19:56,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:19:56,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:19:56,065 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:19:56,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:19:56,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:19:56,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:19:56,067 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_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7994e4b0bfbe275d233e5a25c7b22888e2d55ba388328f1fc4435f77ac9412d [2021-11-02 22:19:56,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:19:56,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:19:56,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:19:56,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:19:56,342 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:19:56,342 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-02 22:19:56,429 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/data/3574a2894/f969d88a2bdb441e9442f58820c11a03/FLAG17065a7db [2021-11-02 22:19:56,991 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:19:56,991 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-02 22:19:57,000 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/data/3574a2894/f969d88a2bdb441e9442f58820c11a03/FLAG17065a7db [2021-11-02 22:19:57,327 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/data/3574a2894/f969d88a2bdb441e9442f58820c11a03 [2021-11-02 22:19:57,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:19:57,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:19:57,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:57,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:19:57,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:19:57,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42383694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57, skipping insertion in model container [2021-11-02 22:19:57,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:19:57,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:19:57,654 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4409,4422] [2021-11-02 22:19:57,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:57,706 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:19:57,762 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4409,4422] [2021-11-02 22:19:57,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:19:57,808 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:19:57,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57 WrapperNode [2021-11-02 22:19:57,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:19:57,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:57,812 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:19:57,812 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:19:57,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:19:57,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:19:57,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:19:57,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:19:57,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:19:57,956 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:19:57,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:19:57,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:19:57,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (1/1) ... [2021-11-02 22:19:57,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:19:57,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:19:57,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:19:57,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:19:58,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:19:58,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:19:58,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:19:58,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:19:58,580 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:19:58,580 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 22:19:58,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:19:58 BoogieIcfgContainer [2021-11-02 22:19:58,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:19:58,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:19:58,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:19:58,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:19:58,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:19:57" (1/3) ... [2021-11-02 22:19:58,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62db111e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:19:58, skipping insertion in model container [2021-11-02 22:19:58,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:19:57" (2/3) ... [2021-11-02 22:19:58,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62db111e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:19:58, skipping insertion in model container [2021-11-02 22:19:58,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:19:58" (3/3) ... [2021-11-02 22:19:58,590 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-02 22:19:58,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:19:58,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:19:58,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:19:58,651 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:19:58,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:19:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 1.6705882352941177) internal successors, (142), 86 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:19:58,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:58,682 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:58,683 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:58,689 INFO L85 PathProgramCache]: Analyzing trace with hash 716810707, now seen corresponding path program 1 times [2021-11-02 22:19:58,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:58,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107128709] [2021-11-02 22:19:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:58,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:59,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:59,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107128709] [2021-11-02 22:19:59,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107128709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:59,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:59,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:59,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355985078] [2021-11-02 22:19:59,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:59,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:59,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:59,081 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 1.6705882352941177) internal successors, (142), 86 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:59,177 INFO L93 Difference]: Finished difference Result 205 states and 324 transitions. [2021-11-02 22:19:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-02 22:19:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:59,190 INFO L225 Difference]: With dead ends: 205 [2021-11-02 22:19:59,191 INFO L226 Difference]: Without dead ends: 132 [2021-11-02 22:19:59,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-02 22:19:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-11-02 22:19:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.503875968992248) internal successors, (194), 129 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 194 transitions. [2021-11-02 22:19:59,256 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 194 transitions. Word has length 38 [2021-11-02 22:19:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:59,256 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 194 transitions. [2021-11-02 22:19:59,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 194 transitions. [2021-11-02 22:19:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:19:59,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:59,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:59,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:19:59,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash -935293361, now seen corresponding path program 1 times [2021-11-02 22:19:59,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:59,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936481253] [2021-11-02 22:19:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:59,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:59,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:59,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936481253] [2021-11-02 22:19:59,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936481253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:59,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:59,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:59,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947205144] [2021-11-02 22:19:59,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:59,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:59,425 INFO L87 Difference]: Start difference. First operand 130 states and 194 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:59,477 INFO L93 Difference]: Finished difference Result 318 states and 490 transitions. [2021-11-02 22:19:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:19:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-02 22:19:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:59,480 INFO L225 Difference]: With dead ends: 318 [2021-11-02 22:19:59,481 INFO L226 Difference]: Without dead ends: 208 [2021-11-02 22:19:59,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-02 22:19:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 206. [2021-11-02 22:19:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.526829268292683) internal successors, (313), 205 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 313 transitions. [2021-11-02 22:19:59,511 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 313 transitions. Word has length 39 [2021-11-02 22:19:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:59,512 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 313 transitions. [2021-11-02 22:19:59,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 313 transitions. [2021-11-02 22:19:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:19:59,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:59,514 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:59,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:19:59,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:59,516 INFO L85 PathProgramCache]: Analyzing trace with hash 830312666, now seen corresponding path program 1 times [2021-11-02 22:19:59,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:59,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739741177] [2021-11-02 22:19:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:59,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:59,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:59,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739741177] [2021-11-02 22:19:59,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739741177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:59,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:59,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:19:59,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940007977] [2021-11-02 22:19:59,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:19:59,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:19:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:59,682 INFO L87 Difference]: Start difference. First operand 206 states and 313 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:19:59,835 INFO L93 Difference]: Finished difference Result 688 states and 1068 transitions. [2021-11-02 22:19:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:19:59,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 22:19:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:19:59,841 INFO L225 Difference]: With dead ends: 688 [2021-11-02 22:19:59,841 INFO L226 Difference]: Without dead ends: 502 [2021-11-02 22:19:59,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:19:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-02 22:19:59,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 498. [2021-11-02 22:19:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.5472837022132797) internal successors, (769), 497 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 769 transitions. [2021-11-02 22:19:59,902 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 769 transitions. Word has length 40 [2021-11-02 22:19:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:19:59,903 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 769 transitions. [2021-11-02 22:19:59,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:19:59,903 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 769 transitions. [2021-11-02 22:19:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:19:59,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:19:59,906 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:19:59,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:19:59,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:19:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:19:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash 604365756, now seen corresponding path program 1 times [2021-11-02 22:19:59,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:19:59,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875761835] [2021-11-02 22:19:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:19:59,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:19:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:19:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:19:59,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:19:59,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875761835] [2021-11-02 22:19:59,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875761835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:19:59,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:19:59,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:19:59,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274389500] [2021-11-02 22:19:59,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:19:59,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:19:59,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:19:59,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:19:59,962 INFO L87 Difference]: Start difference. First operand 498 states and 769 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:00,031 INFO L93 Difference]: Finished difference Result 1258 states and 1951 transitions. [2021-11-02 22:20:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-02 22:20:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:00,037 INFO L225 Difference]: With dead ends: 1258 [2021-11-02 22:20:00,038 INFO L226 Difference]: Without dead ends: 780 [2021-11-02 22:20:00,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-02 22:20:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 778. [2021-11-02 22:20:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.5302445302445302) internal successors, (1189), 777 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1189 transitions. [2021-11-02 22:20:00,136 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1189 transitions. Word has length 41 [2021-11-02 22:20:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:00,137 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1189 transitions. [2021-11-02 22:20:00,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1189 transitions. [2021-11-02 22:20:00,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:20:00,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:00,139 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:00,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:20:00,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:00,142 INFO L85 PathProgramCache]: Analyzing trace with hash 608060849, now seen corresponding path program 1 times [2021-11-02 22:20:00,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:00,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066217747] [2021-11-02 22:20:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:00,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:00,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:00,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066217747] [2021-11-02 22:20:00,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066217747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:00,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:00,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:20:00,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169124636] [2021-11-02 22:20:00,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:00,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:00,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:00,282 INFO L87 Difference]: Start difference. First operand 778 states and 1189 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:00,566 INFO L93 Difference]: Finished difference Result 2066 states and 3175 transitions. [2021-11-02 22:20:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:00,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-02 22:20:00,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:00,577 INFO L225 Difference]: With dead ends: 2066 [2021-11-02 22:20:00,577 INFO L226 Difference]: Without dead ends: 1308 [2021-11-02 22:20:00,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:00,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-11-02 22:20:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1306. [2021-11-02 22:20:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 1.5210727969348659) internal successors, (1985), 1305 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1985 transitions. [2021-11-02 22:20:00,703 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1985 transitions. Word has length 42 [2021-11-02 22:20:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:00,704 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 1985 transitions. [2021-11-02 22:20:00,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1985 transitions. [2021-11-02 22:20:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:20:00,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:00,711 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:00,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:20:00,712 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1912062484, now seen corresponding path program 1 times [2021-11-02 22:20:00,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:00,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375122460] [2021-11-02 22:20:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:00,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:00,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:00,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375122460] [2021-11-02 22:20:00,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375122460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:00,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:00,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:20:00,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191151872] [2021-11-02 22:20:00,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:00,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:00,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:00,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:00,835 INFO L87 Difference]: Start difference. First operand 1306 states and 1985 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:01,211 INFO L93 Difference]: Finished difference Result 5490 states and 8373 transitions. [2021-11-02 22:20:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-02 22:20:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:01,245 INFO L225 Difference]: With dead ends: 5490 [2021-11-02 22:20:01,245 INFO L226 Difference]: Without dead ends: 4204 [2021-11-02 22:20:01,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:20:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2021-11-02 22:20:01,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 2590. [2021-11-02 22:20:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 1.4943993820007726) internal successors, (3869), 2589 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 3869 transitions. [2021-11-02 22:20:01,512 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 3869 transitions. Word has length 42 [2021-11-02 22:20:01,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:01,513 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 3869 transitions. [2021-11-02 22:20:01,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 3869 transitions. [2021-11-02 22:20:01,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:20:01,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:01,517 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:01,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:20:01,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash 836148826, now seen corresponding path program 1 times [2021-11-02 22:20:01,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:01,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353687088] [2021-11-02 22:20:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:01,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:01,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:01,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353687088] [2021-11-02 22:20:01,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353687088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:01,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:01,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:20:01,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77304609] [2021-11-02 22:20:01,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:01,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:01,640 INFO L87 Difference]: Start difference. First operand 2590 states and 3869 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:02,114 INFO L93 Difference]: Finished difference Result 5320 states and 7878 transitions. [2021-11-02 22:20:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:20:02,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-02 22:20:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:02,147 INFO L225 Difference]: With dead ends: 5320 [2021-11-02 22:20:02,147 INFO L226 Difference]: Without dead ends: 5318 [2021-11-02 22:20:02,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:20:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2021-11-02 22:20:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 2750. [2021-11-02 22:20:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.46562386322299) internal successors, (4029), 2749 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 4029 transitions. [2021-11-02 22:20:02,458 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 4029 transitions. Word has length 43 [2021-11-02 22:20:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:02,459 INFO L470 AbstractCegarLoop]: Abstraction has 2750 states and 4029 transitions. [2021-11-02 22:20:02,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 4029 transitions. [2021-11-02 22:20:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:20:02,460 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:02,460 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:02,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:20:02,461 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:02,461 INFO L85 PathProgramCache]: Analyzing trace with hash 161382844, now seen corresponding path program 1 times [2021-11-02 22:20:02,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:02,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717901679] [2021-11-02 22:20:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:02,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:02,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:02,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717901679] [2021-11-02 22:20:02,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717901679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:02,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:02,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:02,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098061386] [2021-11-02 22:20:02,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:02,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:02,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:02,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:02,524 INFO L87 Difference]: Start difference. First operand 2750 states and 4029 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:02,829 INFO L93 Difference]: Finished difference Result 6192 states and 9053 transitions. [2021-11-02 22:20:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-02 22:20:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:02,851 INFO L225 Difference]: With dead ends: 6192 [2021-11-02 22:20:02,851 INFO L226 Difference]: Without dead ends: 3462 [2021-11-02 22:20:02,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-11-02 22:20:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 3440. [2021-11-02 22:20:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.4489677231753417) internal successors, (4983), 3439 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4983 transitions. [2021-11-02 22:20:03,242 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4983 transitions. Word has length 44 [2021-11-02 22:20:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:03,243 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 4983 transitions. [2021-11-02 22:20:03,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4983 transitions. [2021-11-02 22:20:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:20:03,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:03,247 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:03,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:20:03,247 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1477612707, now seen corresponding path program 1 times [2021-11-02 22:20:03,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:03,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729890907] [2021-11-02 22:20:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:03,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:03,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:03,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729890907] [2021-11-02 22:20:03,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729890907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:03,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:03,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:03,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477388087] [2021-11-02 22:20:03,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:03,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:03,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:03,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:03,319 INFO L87 Difference]: Start difference. First operand 3440 states and 4983 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:03,807 INFO L93 Difference]: Finished difference Result 8581 states and 12443 transitions. [2021-11-02 22:20:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:03,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-02 22:20:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:03,840 INFO L225 Difference]: With dead ends: 8581 [2021-11-02 22:20:03,841 INFO L226 Difference]: Without dead ends: 5763 [2021-11-02 22:20:03,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-11-02 22:20:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 5761. [2021-11-02 22:20:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5761 states, 5760 states have (on average 1.4314236111111112) internal successors, (8245), 5760 states have internal predecessors, (8245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5761 states to 5761 states and 8245 transitions. [2021-11-02 22:20:04,487 INFO L78 Accepts]: Start accepts. Automaton has 5761 states and 8245 transitions. Word has length 63 [2021-11-02 22:20:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:04,488 INFO L470 AbstractCegarLoop]: Abstraction has 5761 states and 8245 transitions. [2021-11-02 22:20:04,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5761 states and 8245 transitions. [2021-11-02 22:20:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:20:04,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:04,493 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:04,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:20:04,493 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1700716252, now seen corresponding path program 1 times [2021-11-02 22:20:04,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:04,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146625716] [2021-11-02 22:20:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:04,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:04,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:04,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146625716] [2021-11-02 22:20:04,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146625716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:04,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076496467] [2021-11-02 22:20:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:04,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:04,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:04,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:20:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:04,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:20:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:20:05,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076496467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:05,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:20:05,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-11-02 22:20:05,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965832115] [2021-11-02 22:20:05,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:20:05,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:20:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:20:05,482 INFO L87 Difference]: Start difference. First operand 5761 states and 8245 transitions. Second operand has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 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) [2021-11-02 22:20:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:12,503 INFO L93 Difference]: Finished difference Result 30453 states and 42589 transitions. [2021-11-02 22:20:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 22:20:12,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 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 63 [2021-11-02 22:20:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:12,588 INFO L225 Difference]: With dead ends: 30453 [2021-11-02 22:20:12,588 INFO L226 Difference]: Without dead ends: 25227 [2021-11-02 22:20:12,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1225, Invalid=4937, Unknown=0, NotChecked=0, Total=6162 [2021-11-02 22:20:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25227 states. [2021-11-02 22:20:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25227 to 14019. [2021-11-02 22:20:14,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14019 states, 14018 states have (on average 1.3997717220716221) internal successors, (19622), 14018 states have internal predecessors, (19622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14019 states to 14019 states and 19622 transitions. [2021-11-02 22:20:14,325 INFO L78 Accepts]: Start accepts. Automaton has 14019 states and 19622 transitions. Word has length 63 [2021-11-02 22:20:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:14,326 INFO L470 AbstractCegarLoop]: Abstraction has 14019 states and 19622 transitions. [2021-11-02 22:20:14,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.083333333333334) internal successors, (121), 12 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) [2021-11-02 22:20:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 14019 states and 19622 transitions. [2021-11-02 22:20:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:20:14,332 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:14,332 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:14,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:14,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_859ce8b0-0e39-4d6d-af8a-cc5a9c802c0a/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:20:14,560 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1091273178, now seen corresponding path program 1 times [2021-11-02 22:20:14,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:14,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350645458] [2021-11-02 22:20:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:14,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:20:14,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:14,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350645458] [2021-11-02 22:20:14,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350645458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:14,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:14,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:20:14,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768687142] [2021-11-02 22:20:14,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:14,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:14,637 INFO L87 Difference]: Start difference. First operand 14019 states and 19622 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:16,397 INFO L93 Difference]: Finished difference Result 25395 states and 35841 transitions. [2021-11-02 22:20:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:16,397 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 22:20:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:16,455 INFO L225 Difference]: With dead ends: 25395 [2021-11-02 22:20:16,455 INFO L226 Difference]: Without dead ends: 19428 [2021-11-02 22:20:16,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19428 states. [2021-11-02 22:20:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19428 to 18128. [2021-11-02 22:20:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18128 states, 18127 states have (on average 1.395211562862029) internal successors, (25291), 18127 states have internal predecessors, (25291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 25291 transitions. [2021-11-02 22:20:18,248 INFO L78 Accepts]: Start accepts. Automaton has 18128 states and 25291 transitions. Word has length 63 [2021-11-02 22:20:18,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:18,249 INFO L470 AbstractCegarLoop]: Abstraction has 18128 states and 25291 transitions. [2021-11-02 22:20:18,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 18128 states and 25291 transitions. [2021-11-02 22:20:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:20:18,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:18,254 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:18,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:20:18,254 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:18,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1327011341, now seen corresponding path program 1 times [2021-11-02 22:20:18,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:18,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192667739] [2021-11-02 22:20:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:18,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:18,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:18,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192667739] [2021-11-02 22:20:18,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192667739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:18,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:18,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:18,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36269071] [2021-11-02 22:20:18,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:18,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:18,298 INFO L87 Difference]: Start difference. First operand 18128 states and 25291 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:20,017 INFO L93 Difference]: Finished difference Result 31507 states and 43867 transitions. [2021-11-02 22:20:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-02 22:20:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:20,057 INFO L225 Difference]: With dead ends: 31507 [2021-11-02 22:20:20,057 INFO L226 Difference]: Without dead ends: 19004 [2021-11-02 22:20:20,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19004 states. [2021-11-02 22:20:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19004 to 18235. [2021-11-02 22:20:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18235 states, 18234 states have (on average 1.3704617747065921) internal successors, (24989), 18234 states have internal predecessors, (24989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18235 states to 18235 states and 24989 transitions. [2021-11-02 22:20:21,953 INFO L78 Accepts]: Start accepts. Automaton has 18235 states and 24989 transitions. Word has length 63 [2021-11-02 22:20:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:21,954 INFO L470 AbstractCegarLoop]: Abstraction has 18235 states and 24989 transitions. [2021-11-02 22:20:21,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 18235 states and 24989 transitions. [2021-11-02 22:20:21,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:20:21,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:21,960 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:21,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:20:21,961 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:21,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:21,961 INFO L85 PathProgramCache]: Analyzing trace with hash 161019487, now seen corresponding path program 1 times [2021-11-02 22:20:21,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:21,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212810946] [2021-11-02 22:20:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:21,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:20:22,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:22,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212810946] [2021-11-02 22:20:22,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212810946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:22,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:22,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:20:22,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565770648] [2021-11-02 22:20:22,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:22,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:22,025 INFO L87 Difference]: Start difference. First operand 18235 states and 24989 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:24,417 INFO L93 Difference]: Finished difference Result 45348 states and 61896 transitions. [2021-11-02 22:20:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:24,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 63 [2021-11-02 22:20:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:24,478 INFO L225 Difference]: With dead ends: 45348 [2021-11-02 22:20:24,479 INFO L226 Difference]: Without dead ends: 27200 [2021-11-02 22:20:24,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27200 states. [2021-11-02 22:20:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27200 to 27012. [2021-11-02 22:20:26,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27012 states, 27011 states have (on average 1.352893265706564) internal successors, (36543), 27011 states have internal predecessors, (36543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27012 states to 27012 states and 36543 transitions. [2021-11-02 22:20:27,034 INFO L78 Accepts]: Start accepts. Automaton has 27012 states and 36543 transitions. Word has length 63 [2021-11-02 22:20:27,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:27,034 INFO L470 AbstractCegarLoop]: Abstraction has 27012 states and 36543 transitions. [2021-11-02 22:20:27,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 27012 states and 36543 transitions. [2021-11-02 22:20:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:20:27,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:27,040 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:27,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:20:27,041 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1235936444, now seen corresponding path program 1 times [2021-11-02 22:20:27,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:27,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854434268] [2021-11-02 22:20:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:27,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:20:27,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:27,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854434268] [2021-11-02 22:20:27,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854434268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:27,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:27,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:20:27,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450261271] [2021-11-02 22:20:27,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:27,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:27,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:27,109 INFO L87 Difference]: Start difference. First operand 27012 states and 36543 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:30,205 INFO L93 Difference]: Finished difference Result 36706 states and 50134 transitions. [2021-11-02 22:20:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 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 63 [2021-11-02 22:20:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:30,297 INFO L225 Difference]: With dead ends: 36706 [2021-11-02 22:20:30,297 INFO L226 Difference]: Without dead ends: 33579 [2021-11-02 22:20:30,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33579 states. [2021-11-02 22:20:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33579 to 30041. [2021-11-02 22:20:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30041 states, 30040 states have (on average 1.3554260985352864) internal successors, (40717), 30040 states have internal predecessors, (40717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:33,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30041 states to 30041 states and 40717 transitions. [2021-11-02 22:20:33,392 INFO L78 Accepts]: Start accepts. Automaton has 30041 states and 40717 transitions. Word has length 63 [2021-11-02 22:20:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:33,392 INFO L470 AbstractCegarLoop]: Abstraction has 30041 states and 40717 transitions. [2021-11-02 22:20:33,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 30041 states and 40717 transitions. [2021-11-02 22:20:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:20:33,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:33,399 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:33,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:20:33,400 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1004794437, now seen corresponding path program 1 times [2021-11-02 22:20:33,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:33,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454048430] [2021-11-02 22:20:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:33,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:33,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:33,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454048430] [2021-11-02 22:20:33,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454048430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:33,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:33,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:33,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905512046] [2021-11-02 22:20:33,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:33,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:33,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:33,448 INFO L87 Difference]: Start difference. First operand 30041 states and 40717 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:35,942 INFO L93 Difference]: Finished difference Result 43301 states and 58448 transitions. [2021-11-02 22:20:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:35,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-02 22:20:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:35,988 INFO L225 Difference]: With dead ends: 43301 [2021-11-02 22:20:35,988 INFO L226 Difference]: Without dead ends: 26532 [2021-11-02 22:20:36,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26532 states. [2021-11-02 22:20:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26532 to 26481. [2021-11-02 22:20:38,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26481 states, 26480 states have (on average 1.341880664652568) internal successors, (35533), 26480 states have internal predecessors, (35533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26481 states to 26481 states and 35533 transitions. [2021-11-02 22:20:38,478 INFO L78 Accepts]: Start accepts. Automaton has 26481 states and 35533 transitions. Word has length 64 [2021-11-02 22:20:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:38,479 INFO L470 AbstractCegarLoop]: Abstraction has 26481 states and 35533 transitions. [2021-11-02 22:20:38,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 26481 states and 35533 transitions. [2021-11-02 22:20:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:20:38,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:38,485 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:38,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:20:38,486 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1607670003, now seen corresponding path program 1 times [2021-11-02 22:20:38,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:38,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178720882] [2021-11-02 22:20:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:38,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:20:38,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:38,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178720882] [2021-11-02 22:20:38,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178720882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:38,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:38,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:20:38,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923033594] [2021-11-02 22:20:38,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:38,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:38,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:38,554 INFO L87 Difference]: Start difference. First operand 26481 states and 35533 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:41,837 INFO L93 Difference]: Finished difference Result 34588 states and 46719 transitions. [2021-11-02 22:20:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 65 [2021-11-02 22:20:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:41,879 INFO L225 Difference]: With dead ends: 34588 [2021-11-02 22:20:41,879 INFO L226 Difference]: Without dead ends: 30307 [2021-11-02 22:20:41,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30307 states. [2021-11-02 22:20:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30307 to 29245. [2021-11-02 22:20:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29245 states, 29244 states have (on average 1.3398645876077144) internal successors, (39183), 29244 states have internal predecessors, (39183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29245 states to 29245 states and 39183 transitions. [2021-11-02 22:20:44,569 INFO L78 Accepts]: Start accepts. Automaton has 29245 states and 39183 transitions. Word has length 65 [2021-11-02 22:20:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:44,570 INFO L470 AbstractCegarLoop]: Abstraction has 29245 states and 39183 transitions. [2021-11-02 22:20:44,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 29245 states and 39183 transitions. [2021-11-02 22:20:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 22:20:44,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:44,577 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:44,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:20:44,578 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:44,578 INFO L85 PathProgramCache]: Analyzing trace with hash 254858913, now seen corresponding path program 1 times [2021-11-02 22:20:44,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:44,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662918442] [2021-11-02 22:20:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:44,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:44,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:44,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662918442] [2021-11-02 22:20:44,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662918442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:44,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:44,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:44,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483859512] [2021-11-02 22:20:44,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:44,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:44,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:44,623 INFO L87 Difference]: Start difference. First operand 29245 states and 39183 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)