./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbc1afdc0c527a20ea946075190a27bee4243d56a1bede1487b2df57b3410a93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:22:36,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:22:36,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:22:36,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:22:36,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:22:36,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:22:36,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:22:36,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:22:36,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:22:36,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:22:36,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:22:36,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:22:36,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:22:36,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:22:36,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:22:36,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:22:36,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:22:36,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:22:36,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:22:36,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:22:36,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:22:36,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:22:36,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:22:36,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:22:36,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:22:36,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:22:36,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:22:36,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:22:36,984 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:22:36,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:22:36,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:22:36,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:22:36,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:22:36,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:22:36,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:22:36,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:22:36,992 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:22:36,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:22:36,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:22:36,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:22:36,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:22:36,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:22:37,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:22:37,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:22:37,023 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:22:37,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:22:37,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:22:37,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:22:37,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:22:37,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:22:37,025 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:22:37,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:22:37,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:22:37,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:22:37,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:22:37,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:22:37,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:22:37,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:22:37,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:22:37,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:22:37,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:22:37,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:22:37,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:22:37,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:22:37,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:22:37,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:22:37,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:22:37,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:22:37,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:22:37,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:22:37,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:22:37,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:22:37,030 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:22:37,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:22:37,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:22:37,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:22:37,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbc1afdc0c527a20ea946075190a27bee4243d56a1bede1487b2df57b3410a93 [2021-11-20 07:22:37,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:22:37,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:22:37,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:22:37,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:22:37,304 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:22:37,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 07:22:37,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/data/c017c9d4b/789a149e16b142148771ca30bf7978c6/FLAG53b078ab6 [2021-11-20 07:22:37,925 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:22:37,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 07:22:37,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/data/c017c9d4b/789a149e16b142148771ca30bf7978c6/FLAG53b078ab6 [2021-11-20 07:22:38,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/data/c017c9d4b/789a149e16b142148771ca30bf7978c6 [2021-11-20 07:22:38,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:22:38,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:22:38,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:22:38,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:22:38,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:22:38,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:38,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6a9811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38, skipping insertion in model container [2021-11-20 07:22:38,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:38,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:22:38,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:22:38,597 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10019,10032] [2021-11-20 07:22:38,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:22:38,709 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:22:38,824 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c[10019,10032] [2021-11-20 07:22:38,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:22:38,905 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:22:38,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38 WrapperNode [2021-11-20 07:22:38,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:22:38,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:22:38,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:22:38,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:22:38,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:38,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,009 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 957 [2021-11-20 07:22:39,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:22:39,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:22:39,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:22:39,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:22:39,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:22:39,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:22:39,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:22:39,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:22:39,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (1/1) ... [2021-11-20 07:22:39,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:22:39,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:22:39,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:22:39,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7e556-2c73-431b-950d-c105037a8614/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:22:39,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:22:39,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:22:39,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:22:39,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:22:39,372 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:22:39,374 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:22:40,161 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:22:40,179 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:22:40,180 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:22:40,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:22:40 BoogieIcfgContainer [2021-11-20 07:22:40,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:22:40,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:22:40,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:22:40,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:22:40,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:22:38" (1/3) ... [2021-11-20 07:22:40,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b33d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:22:40, skipping insertion in model container [2021-11-20 07:22:40,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:22:38" (2/3) ... [2021-11-20 07:22:40,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b33d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:22:40, skipping insertion in model container [2021-11-20 07:22:40,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:22:40" (3/3) ... [2021-11-20 07:22:40,200 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2021-11-20 07:22:40,209 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:22:40,209 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:22:40,280 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:22:40,291 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:22:40,291 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:22:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 257 states have (on average 1.7237354085603114) internal successors, (443), 258 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 07:22:40,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:40,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:40,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:40,332 INFO L85 PathProgramCache]: Analyzing trace with hash 891906329, now seen corresponding path program 1 times [2021-11-20 07:22:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:40,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104780813] [2021-11-20 07:22:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:40,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:40,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:40,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104780813] [2021-11-20 07:22:40,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104780813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:40,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:40,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:22:40,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761719457] [2021-11-20 07:22:40,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:40,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:22:40,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:40,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:22:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:22:40,961 INFO L87 Difference]: Start difference. First operand has 259 states, 257 states have (on average 1.7237354085603114) internal successors, (443), 258 states have internal predecessors, (443), 0 states have call successors, (0), 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 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:41,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:41,484 INFO L93 Difference]: Finished difference Result 1164 states and 1888 transitions. [2021-11-20 07:22:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:22:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-11-20 07:22:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:41,518 INFO L225 Difference]: With dead ends: 1164 [2021-11-20 07:22:41,518 INFO L226 Difference]: Without dead ends: 1023 [2021-11-20 07:22:41,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:22:41,529 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 3889 mSDsluCounter, 3535 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3889 SdHoareTripleChecker+Valid, 3985 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:41,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3889 Valid, 3985 Invalid, 164 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:22:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-11-20 07:22:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 396. [2021-11-20 07:22:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 1.5012658227848101) internal successors, (593), 395 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 593 transitions. [2021-11-20 07:22:41,654 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 593 transitions. Word has length 97 [2021-11-20 07:22:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:41,656 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 593 transitions. [2021-11-20 07:22:41,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 593 transitions. [2021-11-20 07:22:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 07:22:41,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:41,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:41,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:22:41,671 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:41,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1536603989, now seen corresponding path program 1 times [2021-11-20 07:22:41,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:41,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247137607] [2021-11-20 07:22:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:41,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:42,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:42,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247137607] [2021-11-20 07:22:42,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247137607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:42,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:42,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 07:22:42,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203808956] [2021-11-20 07:22:42,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:42,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:22:42,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:42,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:22:42,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:22:42,044 INFO L87 Difference]: Start difference. First operand 396 states and 593 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:42,536 INFO L93 Difference]: Finished difference Result 1973 states and 3057 transitions. [2021-11-20 07:22:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:22:42,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-11-20 07:22:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:42,548 INFO L225 Difference]: With dead ends: 1973 [2021-11-20 07:22:42,548 INFO L226 Difference]: Without dead ends: 1677 [2021-11-20 07:22:42,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:22:42,553 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 2742 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2742 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:42,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2742 Valid, 2104 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:22:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-11-20 07:22:42,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1667. [2021-11-20 07:22:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 1.546218487394958) internal successors, (2576), 1666 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2576 transitions. [2021-11-20 07:22:42,749 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2576 transitions. Word has length 98 [2021-11-20 07:22:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:42,752 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2576 transitions. [2021-11-20 07:22:42,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2576 transitions. [2021-11-20 07:22:42,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:22:42,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:42,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:42,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:22:42,761 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash 520748387, now seen corresponding path program 1 times [2021-11-20 07:22:42,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:42,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981418709] [2021-11-20 07:22:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:42,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:42,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981418709] [2021-11-20 07:22:42,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981418709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:42,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:42,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:22:42,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015123044] [2021-11-20 07:22:42,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:42,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:22:42,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:22:42,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:22:42,870 INFO L87 Difference]: Start difference. First operand 1667 states and 2576 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:43,411 INFO L93 Difference]: Finished difference Result 4413 states and 6892 transitions. [2021-11-20 07:22:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:22:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-20 07:22:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:43,431 INFO L225 Difference]: With dead ends: 4413 [2021-11-20 07:22:43,432 INFO L226 Difference]: Without dead ends: 2867 [2021-11-20 07:22:43,435 INFO L932 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 [2021-11-20 07:22:43,442 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 1388 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:43,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1388 Valid, 357 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:22:43,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-11-20 07:22:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2865. [2021-11-20 07:22:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 1.5534217877094971) internal successors, (4449), 2864 states have internal predecessors, (4449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4449 transitions. [2021-11-20 07:22:43,737 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4449 transitions. Word has length 99 [2021-11-20 07:22:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:43,737 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 4449 transitions. [2021-11-20 07:22:43,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4449 transitions. [2021-11-20 07:22:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:22:43,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:43,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:43,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:22:43,742 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:43,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1043155442, now seen corresponding path program 1 times [2021-11-20 07:22:43,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:43,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349074571] [2021-11-20 07:22:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:43,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:43,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:43,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:43,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349074571] [2021-11-20 07:22:43,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349074571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:43,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:43,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:22:43,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44443397] [2021-11-20 07:22:43,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:43,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:22:43,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:43,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:22:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:22:43,841 INFO L87 Difference]: Start difference. First operand 2865 states and 4449 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:44,505 INFO L93 Difference]: Finished difference Result 7872 states and 12314 transitions. [2021-11-20 07:22:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:22:44,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-20 07:22:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:44,539 INFO L225 Difference]: With dead ends: 7872 [2021-11-20 07:22:44,539 INFO L226 Difference]: Without dead ends: 5165 [2021-11-20 07:22:44,547 INFO L932 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 [2021-11-20 07:22:44,559 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 1346 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:44,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1346 Valid, 361 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:22:44,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2021-11-20 07:22:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5163. [2021-11-20 07:22:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 1.5561797752808988) internal successors, (8033), 5162 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:45,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 8033 transitions. [2021-11-20 07:22:45,045 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 8033 transitions. Word has length 99 [2021-11-20 07:22:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:45,047 INFO L470 AbstractCegarLoop]: Abstraction has 5163 states and 8033 transitions. [2021-11-20 07:22:45,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:45,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 8033 transitions. [2021-11-20 07:22:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:22:45,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:45,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:45,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:22:45,052 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:45,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1397069631, now seen corresponding path program 1 times [2021-11-20 07:22:45,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:45,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619322097] [2021-11-20 07:22:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:45,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:45,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:45,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619322097] [2021-11-20 07:22:45,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619322097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:45,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:45,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:22:45,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45586625] [2021-11-20 07:22:45,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:45,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:22:45,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:22:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:22:45,199 INFO L87 Difference]: Start difference. First operand 5163 states and 8033 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:46,216 INFO L93 Difference]: Finished difference Result 14689 states and 22985 transitions. [2021-11-20 07:22:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:22:46,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-20 07:22:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:46,279 INFO L225 Difference]: With dead ends: 14689 [2021-11-20 07:22:46,280 INFO L226 Difference]: Without dead ends: 9725 [2021-11-20 07:22:46,288 INFO L932 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 [2021-11-20 07:22:46,289 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 1334 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:46,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 370 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:22:46,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9725 states. [2021-11-20 07:22:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9725 to 9723. [2021-11-20 07:22:47,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9723 states, 9722 states have (on average 1.5584241925529727) internal successors, (15151), 9722 states have internal predecessors, (15151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9723 states to 9723 states and 15151 transitions. [2021-11-20 07:22:47,194 INFO L78 Accepts]: Start accepts. Automaton has 9723 states and 15151 transitions. Word has length 99 [2021-11-20 07:22:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:47,195 INFO L470 AbstractCegarLoop]: Abstraction has 9723 states and 15151 transitions. [2021-11-20 07:22:47,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9723 states and 15151 transitions. [2021-11-20 07:22:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:22:47,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:47,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:47,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:22:47,200 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:47,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2146829076, now seen corresponding path program 1 times [2021-11-20 07:22:47,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:47,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442625047] [2021-11-20 07:22:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:47,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:47,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:47,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442625047] [2021-11-20 07:22:47,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442625047] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:47,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:47,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:22:47,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289730314] [2021-11-20 07:22:47,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:47,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:22:47,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:22:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:22:47,300 INFO L87 Difference]: Start difference. First operand 9723 states and 15151 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:48,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:48,905 INFO L93 Difference]: Finished difference Result 28649 states and 44743 transitions. [2021-11-20 07:22:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:22:48,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-20 07:22:48,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:48,981 INFO L225 Difference]: With dead ends: 28649 [2021-11-20 07:22:48,982 INFO L226 Difference]: Without dead ends: 19017 [2021-11-20 07:22:49,001 INFO L932 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 [2021-11-20 07:22:49,002 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 1402 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:49,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1402 Valid, 355 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:22:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19017 states. [2021-11-20 07:22:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19017 to 19015. [2021-11-20 07:22:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19015 states, 19014 states have (on average 1.554380982433996) internal successors, (29555), 19014 states have internal predecessors, (29555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19015 states to 19015 states and 29555 transitions. [2021-11-20 07:22:50,243 INFO L78 Accepts]: Start accepts. Automaton has 19015 states and 29555 transitions. Word has length 99 [2021-11-20 07:22:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:50,243 INFO L470 AbstractCegarLoop]: Abstraction has 19015 states and 29555 transitions. [2021-11-20 07:22:50,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 19015 states and 29555 transitions. [2021-11-20 07:22:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:22:50,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:50,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:50,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:22:50,250 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:50,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1517888763, now seen corresponding path program 1 times [2021-11-20 07:22:50,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492400944] [2021-11-20 07:22:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:50,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:50,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:50,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492400944] [2021-11-20 07:22:50,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492400944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:50,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:50,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:22:50,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004753801] [2021-11-20 07:22:50,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:50,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:22:50,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:50,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:22:50,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:22:50,333 INFO L87 Difference]: Start difference. First operand 19015 states and 29555 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:52,911 INFO L93 Difference]: Finished difference Result 56572 states and 88040 transitions. [2021-11-20 07:22:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:22:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-20 07:22:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:53,038 INFO L225 Difference]: With dead ends: 56572 [2021-11-20 07:22:53,038 INFO L226 Difference]: Without dead ends: 37625 [2021-11-20 07:22:53,071 INFO L932 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 [2021-11-20 07:22:53,072 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 1424 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:53,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1424 Valid, 355 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:22:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37625 states. [2021-11-20 07:22:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37625 to 37623. [2021-11-20 07:22:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37623 states, 37622 states have (on average 1.548030407740152) internal successors, (58240), 37622 states have internal predecessors, (58240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37623 states to 37623 states and 58240 transitions. [2021-11-20 07:22:55,217 INFO L78 Accepts]: Start accepts. Automaton has 37623 states and 58240 transitions. Word has length 99 [2021-11-20 07:22:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:22:55,217 INFO L470 AbstractCegarLoop]: Abstraction has 37623 states and 58240 transitions. [2021-11-20 07:22:55,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 37623 states and 58240 transitions. [2021-11-20 07:22:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 07:22:55,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:22:55,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:22:55,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 07:22:55,228 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:22:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:22:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1740503754, now seen corresponding path program 1 times [2021-11-20 07:22:55,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:22:55,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614965354] [2021-11-20 07:22:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:22:55,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:22:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:22:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:22:55,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:22:55,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614965354] [2021-11-20 07:22:55,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614965354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:22:55,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:22:55,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:22:55,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101950850] [2021-11-20 07:22:55,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:22:55,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:22:55,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:22:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:22:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:22:55,320 INFO L87 Difference]: Start difference. First operand 37623 states and 58240 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:22:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:22:59,375 INFO L93 Difference]: Finished difference Result 107195 states and 166076 transitions. [2021-11-20 07:22:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:22:59,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-11-20 07:22:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:22:59,552 INFO L225 Difference]: With dead ends: 107195 [2021-11-20 07:22:59,552 INFO L226 Difference]: Without dead ends: 69624 [2021-11-20 07:22:59,613 INFO L932 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 [2021-11-20 07:22:59,614 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 1450 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:22:59,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1450 Valid, 353 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:22:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69624 states. [2021-11-20 07:23:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69624 to 69622. [2021-11-20 07:23:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69622 states, 69621 states have (on average 1.5395498484652619) internal successors, (107185), 69621 states have internal predecessors, (107185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69622 states to 69622 states and 107185 transitions. [2021-11-20 07:23:03,918 INFO L78 Accepts]: Start accepts. Automaton has 69622 states and 107185 transitions. Word has length 99 [2021-11-20 07:23:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:03,918 INFO L470 AbstractCegarLoop]: Abstraction has 69622 states and 107185 transitions. [2021-11-20 07:23:03,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 69622 states and 107185 transitions. [2021-11-20 07:23:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-20 07:23:03,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:03,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:03,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 07:23:03,935 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1377652457, now seen corresponding path program 1 times [2021-11-20 07:23:03,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328126617] [2021-11-20 07:23:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:03,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:23:04,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328126617] [2021-11-20 07:23:04,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328126617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:04,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:04,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:23:04,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311987795] [2021-11-20 07:23:04,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:04,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:23:04,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:23:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:23:04,068 INFO L87 Difference]: Start difference. First operand 69622 states and 107185 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:23:12,277 INFO L93 Difference]: Finished difference Result 138872 states and 213138 transitions. [2021-11-20 07:23:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:23:12,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-20 07:23:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:23:12,543 INFO L225 Difference]: With dead ends: 138872 [2021-11-20 07:23:12,543 INFO L226 Difference]: Without dead ends: 138870 [2021-11-20 07:23:12,577 INFO L932 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 [2021-11-20 07:23:12,580 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 360 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:23:12,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 1473 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:23:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138870 states. [2021-11-20 07:23:18,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138870 to 71030. [2021-11-20 07:23:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71030 states, 71029 states have (on average 1.5288544115783693) internal successors, (108593), 71029 states have internal predecessors, (108593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71030 states to 71030 states and 108593 transitions. [2021-11-20 07:23:18,607 INFO L78 Accepts]: Start accepts. Automaton has 71030 states and 108593 transitions. Word has length 100 [2021-11-20 07:23:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:23:18,607 INFO L470 AbstractCegarLoop]: Abstraction has 71030 states and 108593 transitions. [2021-11-20 07:23:18,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:23:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 71030 states and 108593 transitions. [2021-11-20 07:23:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 07:23:18,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:23:18,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:23:18,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 07:23:18,628 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:23:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:23:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash 101785651, now seen corresponding path program 1 times [2021-11-20 07:23:18,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:23:18,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331690790] [2021-11-20 07:23:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:23:18,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:23:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:23:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:23:18,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:23:18,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331690790] [2021-11-20 07:23:18,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331690790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:23:18,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:23:18,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 07:23:18,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734918634] [2021-11-20 07:23:18,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:23:18,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:23:18,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:23:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:23:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:23:18,841 INFO L87 Difference]: Start difference. First operand 71030 states and 108593 transitions. Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 9 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)