./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc --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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 19:49:58,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 19:49:58,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 19:49:58,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 19:49:58,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 19:49:58,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 19:49:58,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 19:49:58,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 19:49:58,254 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 19:49:58,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 19:49:58,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 19:49:58,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 19:49:58,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 19:49:58,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 19:49:58,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 19:49:58,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 19:49:58,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 19:49:58,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 19:49:58,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 19:49:58,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 19:49:58,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 19:49:58,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 19:49:58,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 19:49:58,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 19:49:58,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 19:49:58,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 19:49:58,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 19:49:58,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 19:49:58,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 19:49:58,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 19:49:58,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 19:49:58,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 19:49:58,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 19:49:58,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 19:49:58,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 19:49:58,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 19:49:58,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 19:49:58,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 19:49:58,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 19:49:58,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 19:49:58,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 19:49:58,308 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 19:49:58,347 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 19:49:58,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 19:49:58,348 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 19:49:58,348 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 19:49:58,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 19:49:58,349 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 19:49:58,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 19:49:58,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 19:49:58,350 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 19:49:58,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 19:49:58,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 19:49:58,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 19:49:58,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 19:49:58,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 19:49:58,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 19:49:58,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 19:49:58,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 19:49:58,353 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 19:49:58,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 19:49:58,354 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 19:49:58,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 19:49:58,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 19:49:58,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 19:49:58,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 19:49:58,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 19:49:58,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 19:49:58,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 19:49:58,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 19:49:58,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 19:49:58,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 19:49:58,357 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 19:49:58,358 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 19:49:58,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 19:49:58,358 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_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2022-11-02 19:49:58,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 19:49:58,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 19:49:58,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 19:49:58,695 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 19:49:58,696 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 19:49:58,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2022-11-02 19:49:58,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data/907f90b03/bbca1e5711dd42818babfd19d482d3f8/FLAG6a495684d [2022-11-02 19:49:59,371 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 19:49:59,375 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2022-11-02 19:49:59,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data/907f90b03/bbca1e5711dd42818babfd19d482d3f8/FLAG6a495684d [2022-11-02 19:49:59,702 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data/907f90b03/bbca1e5711dd42818babfd19d482d3f8 [2022-11-02 19:49:59,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 19:49:59,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 19:49:59,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 19:49:59,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 19:49:59,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 19:49:59,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:49:59" (1/1) ... [2022-11-02 19:49:59,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f9a355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:49:59, skipping insertion in model container [2022-11-02 19:49:59,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:49:59" (1/1) ... [2022-11-02 19:49:59,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 19:49:59,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 19:49:59,973 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_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2022-11-02 19:49:59,980 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_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2022-11-02 19:49:59,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 19:49:59,996 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 19:50:00,021 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_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2022-11-02 19:50:00,023 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_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2022-11-02 19:50:00,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 19:50:00,038 INFO L208 MainTranslator]: Completed translation [2022-11-02 19:50:00,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00 WrapperNode [2022-11-02 19:50:00,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 19:50:00,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 19:50:00,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 19:50:00,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 19:50:00,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,084 INFO L138 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2022-11-02 19:50:00,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 19:50:00,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 19:50:00,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 19:50:00,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 19:50:00,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,115 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 19:50:00,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 19:50:00,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 19:50:00,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 19:50:00,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (1/1) ... [2022-11-02 19:50:00,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 19:50:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:50:00,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 19:50:00,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 19:50:00,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 19:50:00,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 19:50:00,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 19:50:00,208 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-11-02 19:50:00,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-11-02 19:50:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2022-11-02 19:50:00,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2022-11-02 19:50:00,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-11-02 19:50:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 19:50:00,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 19:50:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 19:50:00,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 19:50:00,355 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 19:50:00,373 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 19:50:00,770 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 19:50:00,779 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 19:50:00,779 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 19:50:00,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:00 BoogieIcfgContainer [2022-11-02 19:50:00,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 19:50:00,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 19:50:00,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 19:50:00,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 19:50:00,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:49:59" (1/3) ... [2022-11-02 19:50:00,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313bfe86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:50:00, skipping insertion in model container [2022-11-02 19:50:00,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:00" (2/3) ... [2022-11-02 19:50:00,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313bfe86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:50:00, skipping insertion in model container [2022-11-02 19:50:00,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:00" (3/3) ... [2022-11-02 19:50:00,793 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2022-11-02 19:50:00,816 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 19:50:00,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 19:50:00,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 19:50:00,889 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1996f3e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 19:50:00,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 19:50:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 44 states have internal predecessors, (61), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 19:50:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 19:50:00,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:00,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:00,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash -625969503, now seen corresponding path program 1 times [2022-11-02 19:50:00,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:00,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936006864] [2022-11-02 19:50:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-02 19:50:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 19:50:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 19:50:01,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:01,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936006864] [2022-11-02 19:50:01,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936006864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:01,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:01,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 19:50:01,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004369678] [2022-11-02 19:50:01,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:01,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 19:50:01,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 19:50:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 19:50:01,447 INFO L87 Difference]: Start difference. First operand has 57 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 44 states have internal predecessors, (61), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 19:50:01,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:01,651 INFO L93 Difference]: Finished difference Result 108 states and 156 transitions. [2022-11-02 19:50:01,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 19:50:01,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-02 19:50:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:01,664 INFO L225 Difference]: With dead ends: 108 [2022-11-02 19:50:01,664 INFO L226 Difference]: Without dead ends: 62 [2022-11-02 19:50:01,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 19:50:01,672 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 19 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:01,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 245 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-02 19:50:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-11-02 19:50:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 19:50:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2022-11-02 19:50:01,725 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 28 [2022-11-02 19:50:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:01,726 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2022-11-02 19:50:01,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 19:50:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2022-11-02 19:50:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 19:50:01,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:01,730 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:01,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 19:50:01,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:01,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash 716059, now seen corresponding path program 1 times [2022-11-02 19:50:01,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:01,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321198495] [2022-11-02 19:50:01,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:01,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 19:50:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 19:50:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 19:50:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 19:50:01,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:01,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321198495] [2022-11-02 19:50:01,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321198495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:01,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:01,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 19:50:01,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610693398] [2022-11-02 19:50:01,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:01,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 19:50:01,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 19:50:01,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 19:50:01,974 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:02,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:02,077 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2022-11-02 19:50:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 19:50:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-11-02 19:50:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:02,081 INFO L225 Difference]: With dead ends: 79 [2022-11-02 19:50:02,081 INFO L226 Difference]: Without dead ends: 59 [2022-11-02 19:50:02,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 19:50:02,083 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 3 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:02,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 225 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:02,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-02 19:50:02,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-02 19:50:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-02 19:50:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-11-02 19:50:02,094 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2022-11-02 19:50:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:02,095 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-11-02 19:50:02,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-11-02 19:50:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 19:50:02,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:02,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:02,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 19:50:02,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:02,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:02,098 INFO L85 PathProgramCache]: Analyzing trace with hash 840977401, now seen corresponding path program 1 times [2022-11-02 19:50:02,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:02,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001693664] [2022-11-02 19:50:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:02,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 19:50:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 19:50:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 19:50:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 19:50:02,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:02,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001693664] [2022-11-02 19:50:02,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001693664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:02,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:02,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 19:50:02,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807225932] [2022-11-02 19:50:02,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:02,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 19:50:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 19:50:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 19:50:02,246 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:02,349 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-11-02 19:50:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 19:50:02,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-02 19:50:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:02,353 INFO L225 Difference]: With dead ends: 83 [2022-11-02 19:50:02,353 INFO L226 Difference]: Without dead ends: 63 [2022-11-02 19:50:02,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 19:50:02,355 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 3 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:02,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 241 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-02 19:50:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-11-02 19:50:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-02 19:50:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-11-02 19:50:02,375 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 35 [2022-11-02 19:50:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:02,376 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-11-02 19:50:02,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-11-02 19:50:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 19:50:02,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:02,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 19:50:02,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash -902959273, now seen corresponding path program 1 times [2022-11-02 19:50:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896730956] [2022-11-02 19:50:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:02,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 19:50:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 19:50:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-02 19:50:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 19:50:02,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:02,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896730956] [2022-11-02 19:50:02,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896730956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:02,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:02,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 19:50:02,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290393901] [2022-11-02 19:50:02,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:02,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 19:50:02,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 19:50:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 19:50:02,709 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:02,834 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-11-02 19:50:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 19:50:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-11-02 19:50:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:02,839 INFO L225 Difference]: With dead ends: 83 [2022-11-02 19:50:02,839 INFO L226 Difference]: Without dead ends: 63 [2022-11-02 19:50:02,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 19:50:02,851 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 3 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:02,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 241 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-02 19:50:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-11-02 19:50:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-02 19:50:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-11-02 19:50:02,861 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 36 [2022-11-02 19:50:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:02,862 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-11-02 19:50:02,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-11-02 19:50:02,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 19:50:02,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:02,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 19:50:02,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1658214444, now seen corresponding path program 1 times [2022-11-02 19:50:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:02,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977345963] [2022-11-02 19:50:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:02,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 19:50:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 19:50:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:02,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 19:50:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:03,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-02 19:50:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 19:50:03,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 19:50:03,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977345963] [2022-11-02 19:50:03,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977345963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:03,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:03,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:03,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208980341] [2022-11-02 19:50:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:03,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:03,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 19:50:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:03,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:03,025 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 19:50:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:03,095 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-11-02 19:50:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:03,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-11-02 19:50:03,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:03,099 INFO L225 Difference]: With dead ends: 62 [2022-11-02 19:50:03,099 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 19:50:03,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:03,106 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:03,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 172 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 19:50:03,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-02 19:50:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-02 19:50:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2022-11-02 19:50:03,126 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 37 [2022-11-02 19:50:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:03,127 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2022-11-02 19:50:03,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-02 19:50:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2022-11-02 19:50:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 19:50:03,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:03,133 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:03,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 19:50:03,134 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1826594765, now seen corresponding path program 1 times [2022-11-02 19:50:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 19:50:03,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719492543] [2022-11-02 19:50:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:03,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 19:50:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 19:50:03,163 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 19:50:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 19:50:03,201 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 19:50:03,201 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 19:50:03,203 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-02 19:50:03,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 19:50:03,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 19:50:03,209 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-02 19:50:03,213 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 19:50:03,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 07:50:03 BoogieIcfgContainer [2022-11-02 19:50:03,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 19:50:03,254 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 19:50:03,254 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 19:50:03,254 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 19:50:03,255 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:00" (3/4) ... [2022-11-02 19:50:03,258 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 19:50:03,258 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 19:50:03,259 INFO L158 Benchmark]: Toolchain (without parser) took 3549.87ms. Allocated memory was 109.1MB in the beginning and 157.3MB in the end (delta: 48.2MB). Free memory was 84.0MB in the beginning and 91.0MB in the end (delta: -7.0MB). Peak memory consumption was 41.0MB. Max. memory is 16.1GB. [2022-11-02 19:50:03,259 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 109.1MB. Free memory is still 65.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 19:50:03,260 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.69ms. Allocated memory was 109.1MB in the beginning and 157.3MB in the end (delta: 48.2MB). Free memory was 83.6MB in the beginning and 131.7MB in the end (delta: -48.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 19:50:03,260 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.83ms. Allocated memory is still 157.3MB. Free memory was 131.7MB in the beginning and 130.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 19:50:03,261 INFO L158 Benchmark]: Boogie Preprocessor took 33.13ms. Allocated memory is still 157.3MB. Free memory was 130.0MB in the beginning and 128.4MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-02 19:50:03,261 INFO L158 Benchmark]: RCFGBuilder took 662.63ms. Allocated memory is still 157.3MB. Free memory was 128.4MB in the beginning and 113.8MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-02 19:50:03,261 INFO L158 Benchmark]: TraceAbstraction took 2468.51ms. Allocated memory is still 157.3MB. Free memory was 113.3MB in the beginning and 91.0MB in the end (delta: 22.3MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2022-11-02 19:50:03,261 INFO L158 Benchmark]: Witness Printer took 4.55ms. Allocated memory is still 157.3MB. Free memory is still 91.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 19:50:03,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 109.1MB. Free memory is still 65.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 322.69ms. Allocated memory was 109.1MB in the beginning and 157.3MB in the end (delta: 48.2MB). Free memory was 83.6MB in the beginning and 131.7MB in the end (delta: -48.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.83ms. Allocated memory is still 157.3MB. Free memory was 131.7MB in the beginning and 130.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.13ms. Allocated memory is still 157.3MB. Free memory was 130.0MB in the beginning and 128.4MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 662.63ms. Allocated memory is still 157.3MB. Free memory was 128.4MB in the beginning and 113.8MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2468.51ms. Allocated memory is still 157.3MB. Free memory was 113.3MB in the beginning and 91.0MB in the end (delta: 22.3MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. * Witness Printer took 4.55ms. Allocated memory is still 157.3MB. Free memory is still 91.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 76]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 75. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L69] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578697] [L57] return x != x; VAL [\old(x)=4286578697, \result=1, x=4286578697] [L69] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=4286578697] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=4286578697] [L69] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578696] [L57] return x != x; VAL [\old(x)=4286578696, \result=0, x=4286578696] [L69] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578697, y=4286578696] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578697, y=4286578696] [L69-L70] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578697, y=4286578696] [L69-L70] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L72] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578697] [L23] __uint32_t w; VAL [\old(x)=4286578697, x=4286578697] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=4286578697, w=4286578689, x=4286578697] [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=4286578697, w=4286578689, x=4286578697] [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=4286578697, w=4286578689, x=4286578697] [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; VAL [\old(x)=4286578697, \result=0, w=4286578689, x=4286578697] [L46] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578697, \old(y)=4286578696, __fpclassify_float(x)=0, x=4286578697, y=4286578696] [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; VAL [\old(x)=4286578697, \old(y)=4286578696, \result=4286578696, x=4286578697, y=4286578696] [L72] RET, EXPR fmax_float(x, y) [L72] float res = fmax_float(x, y); [L75] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578697] [L57] return x != x; VAL [\old(x)=4286578697, \result=1, x=4286578697] [L75] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=4286578696, x=4286578697, y=4286578696] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=4286578696, x=4286578697, y=4286578696] [L75] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578696] [L57] return x != x; VAL [\old(x)=4286578696, \result=0, x=4286578696] [L75] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578696, x=4286578697, y=4286578696] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578696, x=4286578697, y=4286578696] [L75] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L76] reach_error() VAL [res=4286578696, x=4286578697, y=4286578696] - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 57 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 1124 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 759 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 233 IncrementalHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 365 mSDtfsCounter, 233 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 268 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 39/39 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-02 19:50:03,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc --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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 19:50:05,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 19:50:05,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 19:50:05,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 19:50:05,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 19:50:05,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 19:50:05,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 19:50:05,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 19:50:05,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 19:50:05,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 19:50:05,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 19:50:05,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 19:50:05,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 19:50:05,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 19:50:05,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 19:50:05,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 19:50:05,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 19:50:05,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 19:50:05,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 19:50:05,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 19:50:05,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 19:50:05,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 19:50:05,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 19:50:05,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 19:50:05,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 19:50:05,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 19:50:05,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 19:50:05,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 19:50:05,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 19:50:05,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 19:50:05,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 19:50:05,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 19:50:05,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 19:50:05,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 19:50:05,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 19:50:05,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 19:50:05,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 19:50:05,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 19:50:05,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 19:50:05,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 19:50:05,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 19:50:05,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-02 19:50:05,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 19:50:05,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 19:50:05,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 19:50:05,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 19:50:05,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 19:50:05,990 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 19:50:05,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 19:50:05,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 19:50:05,991 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 19:50:05,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 19:50:05,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 19:50:05,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 19:50:05,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 19:50:05,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 19:50:05,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 19:50:05,993 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 19:50:05,993 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 19:50:05,993 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 19:50:05,993 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 19:50:05,994 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 19:50:05,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 19:50:05,994 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 19:50:05,994 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 19:50:05,994 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 19:50:05,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 19:50:05,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 19:50:05,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 19:50:05,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 19:50:05,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 19:50:05,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 19:50:05,996 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 19:50:05,996 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 19:50:05,996 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 19:50:05,997 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 19:50:05,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 19:50:05,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 19:50:05,997 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2022-11-02 19:50:06,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 19:50:06,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 19:50:06,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 19:50:06,496 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 19:50:06,502 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 19:50:06,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2022-11-02 19:50:06,574 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data/db5289d5c/09d1f2db551c48b49c91a980339a5e60/FLAGced9a1c26 [2022-11-02 19:50:07,223 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 19:50:07,224 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2022-11-02 19:50:07,234 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data/db5289d5c/09d1f2db551c48b49c91a980339a5e60/FLAGced9a1c26 [2022-11-02 19:50:07,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/data/db5289d5c/09d1f2db551c48b49c91a980339a5e60 [2022-11-02 19:50:07,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 19:50:07,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 19:50:07,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 19:50:07,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 19:50:07,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 19:50:07,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712cb4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07, skipping insertion in model container [2022-11-02 19:50:07,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 19:50:07,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 19:50:07,797 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_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2022-11-02 19:50:07,800 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_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2022-11-02 19:50:07,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 19:50:07,813 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 19:50:07,836 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_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2022-11-02 19:50:07,837 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_87930c66-1db7-4c4f-8e05-fb339938b673/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2022-11-02 19:50:07,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 19:50:07,854 INFO L208 MainTranslator]: Completed translation [2022-11-02 19:50:07,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07 WrapperNode [2022-11-02 19:50:07,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 19:50:07,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 19:50:07,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 19:50:07,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 19:50:07,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,893 INFO L138 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-11-02 19:50:07,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 19:50:07,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 19:50:07,894 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 19:50:07,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 19:50:07,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 19:50:07,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 19:50:07,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 19:50:07,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 19:50:07,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (1/1) ... [2022-11-02 19:50:07,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 19:50:07,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 19:50:07,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 19:50:07,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 19:50:08,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 19:50:08,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-02 19:50:08,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 19:50:08,031 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-11-02 19:50:08,032 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-11-02 19:50:08,032 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2022-11-02 19:50:08,032 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2022-11-02 19:50:08,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-02 19:50:08,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 19:50:08,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 19:50:08,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2022-11-02 19:50:08,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 19:50:08,177 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 19:50:08,182 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 19:50:08,582 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 19:50:08,603 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 19:50:08,604 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 19:50:08,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:08 BoogieIcfgContainer [2022-11-02 19:50:08,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 19:50:08,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 19:50:08,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 19:50:08,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 19:50:08,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 07:50:07" (1/3) ... [2022-11-02 19:50:08,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbb2dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:50:08, skipping insertion in model container [2022-11-02 19:50:08,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 07:50:07" (2/3) ... [2022-11-02 19:50:08,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbb2dab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 07:50:08, skipping insertion in model container [2022-11-02 19:50:08,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:08" (3/3) ... [2022-11-02 19:50:08,635 INFO L112 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2022-11-02 19:50:08,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 19:50:08,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 19:50:08,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 19:50:08,765 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1044071b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 19:50:08,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 19:50:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 19:50:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 19:50:08,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:08,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:08,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:08,791 INFO L85 PathProgramCache]: Analyzing trace with hash 956195031, now seen corresponding path program 1 times [2022-11-02 19:50:08,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:08,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475548849] [2022-11-02 19:50:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:08,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:08,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:08,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:08,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 19:50:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 19:50:09,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:50:09,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:09,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:09,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475548849] [2022-11-02 19:50:09,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475548849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:09,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:09,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 19:50:09,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424580920] [2022-11-02 19:50:09,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:09,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 19:50:09,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:09,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 19:50:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 19:50:09,079 INFO L87 Difference]: Start difference. First operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 19:50:09,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:09,109 INFO L93 Difference]: Finished difference Result 93 states and 134 transitions. [2022-11-02 19:50:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 19:50:09,112 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-02 19:50:09,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:09,121 INFO L225 Difference]: With dead ends: 93 [2022-11-02 19:50:09,122 INFO L226 Difference]: Without dead ends: 51 [2022-11-02 19:50:09,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 19:50:09,130 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:09,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-02 19:50:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-02 19:50:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 19:50:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-11-02 19:50:09,181 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 27 [2022-11-02 19:50:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:09,183 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-11-02 19:50:09,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 19:50:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-11-02 19:50:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 19:50:09,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:09,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:09,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:09,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:09,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:09,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1128254016, now seen corresponding path program 1 times [2022-11-02 19:50:09,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:09,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280926207] [2022-11-02 19:50:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:09,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:09,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:09,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:09,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 19:50:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:09,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:09,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 19:50:09,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:09,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280926207] [2022-11-02 19:50:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280926207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:09,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:09,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038844442] [2022-11-02 19:50:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:09,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:09,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:09,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:09,571 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 19:50:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:09,660 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2022-11-02 19:50:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 19:50:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-02 19:50:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:09,668 INFO L225 Difference]: With dead ends: 96 [2022-11-02 19:50:09,669 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 19:50:09,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 19:50:09,674 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:09,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 192 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 19:50:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2022-11-02 19:50:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 19:50:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2022-11-02 19:50:09,702 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 28 [2022-11-02 19:50:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:09,703 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2022-11-02 19:50:09,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 19:50:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2022-11-02 19:50:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 19:50:09,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:09,708 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:09,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:09,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:09,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash 987158491, now seen corresponding path program 1 times [2022-11-02 19:50:09,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:09,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397423083] [2022-11-02 19:50:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:09,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:09,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:09,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:09,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 19:50:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:10,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:10,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 19:50:10,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:10,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:10,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397423083] [2022-11-02 19:50:10,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397423083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:10,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:10,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880297506] [2022-11-02 19:50:10,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:10,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:10,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:10,151 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:10,198 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2022-11-02 19:50:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-11-02 19:50:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:10,202 INFO L225 Difference]: With dead ends: 76 [2022-11-02 19:50:10,202 INFO L226 Difference]: Without dead ends: 56 [2022-11-02 19:50:10,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:10,204 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:10,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-02 19:50:10,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-02 19:50:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-02 19:50:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-11-02 19:50:10,213 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 33 [2022-11-02 19:50:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:10,214 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-11-02 19:50:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-11-02 19:50:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 19:50:10,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:10,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:10,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:10,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:10,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash 871427583, now seen corresponding path program 1 times [2022-11-02 19:50:10,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:10,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164076563] [2022-11-02 19:50:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:10,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:10,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:10,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:10,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 19:50:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:10,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 19:50:10,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:10,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:10,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164076563] [2022-11-02 19:50:10,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164076563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:10,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:10,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:10,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417154879] [2022-11-02 19:50:10,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:10,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:10,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:10,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:10,583 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:10,632 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-11-02 19:50:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-11-02 19:50:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:10,637 INFO L225 Difference]: With dead ends: 79 [2022-11-02 19:50:10,639 INFO L226 Difference]: Without dead ends: 59 [2022-11-02 19:50:10,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:10,642 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:10,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-02 19:50:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-11-02 19:50:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-02 19:50:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-11-02 19:50:10,662 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 34 [2022-11-02 19:50:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:10,663 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-11-02 19:50:10,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:10,666 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-11-02 19:50:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 19:50:10,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:10,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:10,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:10,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:10,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash 405124703, now seen corresponding path program 1 times [2022-11-02 19:50:10,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:10,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302957792] [2022-11-02 19:50:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:10,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:10,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:10,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 19:50:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:11,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 19:50:11,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:11,042 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:11,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302957792] [2022-11-02 19:50:11,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302957792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:11,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:11,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:11,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391468237] [2022-11-02 19:50:11,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:11,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:11,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:11,050 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:11,112 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-11-02 19:50:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-02 19:50:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:11,115 INFO L225 Difference]: With dead ends: 79 [2022-11-02 19:50:11,115 INFO L226 Difference]: Without dead ends: 59 [2022-11-02 19:50:11,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:11,117 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:11,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:11,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-02 19:50:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-11-02 19:50:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-02 19:50:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-11-02 19:50:11,127 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 35 [2022-11-02 19:50:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:11,128 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-11-02 19:50:11,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-11-02 19:50:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 19:50:11,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:11,130 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:11,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:11,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:11,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:11,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1955992579, now seen corresponding path program 1 times [2022-11-02 19:50:11,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:11,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5094706] [2022-11-02 19:50:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:11,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:11,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:11,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:11,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 19:50:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:11,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 19:50:11,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:11,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:11,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5094706] [2022-11-02 19:50:11,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5094706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:11,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:11,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:11,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852296396] [2022-11-02 19:50:11,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:11,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:11,490 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:11,543 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-11-02 19:50:11,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:11,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-11-02 19:50:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:11,545 INFO L225 Difference]: With dead ends: 79 [2022-11-02 19:50:11,547 INFO L226 Difference]: Without dead ends: 59 [2022-11-02 19:50:11,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:11,550 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:11,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-02 19:50:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-11-02 19:50:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-02 19:50:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-11-02 19:50:11,563 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 36 [2022-11-02 19:50:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:11,564 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-11-02 19:50:11,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 19:50:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-11-02 19:50:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 19:50:11,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:11,571 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:11,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-02 19:50:11,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:11,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:11,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1662589572, now seen corresponding path program 1 times [2022-11-02 19:50:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:11,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272743592] [2022-11-02 19:50:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:11,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:11,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:11,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 19:50:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:11,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 19:50:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 19:50:12,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 19:50:12,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272743592] [2022-11-02 19:50:12,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272743592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:12,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:12,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-11-02 19:50:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047768534] [2022-11-02 19:50:12,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:12,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 19:50:12,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:12,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 19:50:12,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 19:50:12,530 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:13,271 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-11-02 19:50:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 19:50:13,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 36 [2022-11-02 19:50:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:13,277 INFO L225 Difference]: With dead ends: 102 [2022-11-02 19:50:13,277 INFO L226 Difference]: Without dead ends: 88 [2022-11-02 19:50:13,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-02 19:50:13,278 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 103 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:13,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 639 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 19:50:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-02 19:50:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2022-11-02 19:50:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-02 19:50:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-11-02 19:50:13,288 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 36 [2022-11-02 19:50:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:13,289 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-11-02 19:50:13,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-11-02 19:50:13,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 19:50:13,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:13,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:13,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:13,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:13,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2045835875, now seen corresponding path program 1 times [2022-11-02 19:50:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:13,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988262834] [2022-11-02 19:50:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:13,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:13,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 19:50:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 19:50:13,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 19:50:13,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:13,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:13,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988262834] [2022-11-02 19:50:13,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988262834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:13,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:13,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 19:50:13,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061226167] [2022-11-02 19:50:13,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:13,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 19:50:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 19:50:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 19:50:13,807 INFO L87 Difference]: Start difference. First operand 74 states and 105 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 19:50:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:14,259 INFO L93 Difference]: Finished difference Result 127 states and 174 transitions. [2022-11-02 19:50:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 19:50:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-11-02 19:50:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:14,262 INFO L225 Difference]: With dead ends: 127 [2022-11-02 19:50:14,262 INFO L226 Difference]: Without dead ends: 87 [2022-11-02 19:50:14,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-02 19:50:14,263 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 56 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:14,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 498 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 19:50:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-02 19:50:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2022-11-02 19:50:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2022-11-02 19:50:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2022-11-02 19:50:14,272 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 38 [2022-11-02 19:50:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:14,273 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2022-11-02 19:50:14,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 19:50:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2022-11-02 19:50:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 19:50:14,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:14,274 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:14,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:14,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash -490349503, now seen corresponding path program 1 times [2022-11-02 19:50:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:14,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650042038] [2022-11-02 19:50:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:14,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:14,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:14,492 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:14,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 19:50:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 19:50:14,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 19:50:15,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 19:50:15,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:15,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650042038] [2022-11-02 19:50:15,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650042038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:15,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:15,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-02 19:50:15,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914049116] [2022-11-02 19:50:15,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:15,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 19:50:15,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:15,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 19:50:15,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-02 19:50:15,523 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 19:50:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:16,394 INFO L93 Difference]: Finished difference Result 117 states and 162 transitions. [2022-11-02 19:50:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 19:50:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2022-11-02 19:50:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:16,396 INFO L225 Difference]: With dead ends: 117 [2022-11-02 19:50:16,396 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 19:50:16,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-02 19:50:16,397 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 149 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:16,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 463 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 19:50:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 19:50:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2022-11-02 19:50:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-02 19:50:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2022-11-02 19:50:16,409 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 41 [2022-11-02 19:50:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:16,410 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2022-11-02 19:50:16,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-02 19:50:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2022-11-02 19:50:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 19:50:16,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:16,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:16,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:16,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:16,612 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:16,612 INFO L85 PathProgramCache]: Analyzing trace with hash 38675638, now seen corresponding path program 1 times [2022-11-02 19:50:16,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:16,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864210300] [2022-11-02 19:50:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:16,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:16,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:16,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:16,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 19:50:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 19:50:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 19:50:16,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:16,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:16,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864210300] [2022-11-02 19:50:16,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864210300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:16,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:16,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 19:50:16,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136152662] [2022-11-02 19:50:16,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:16,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 19:50:16,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:16,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 19:50:16,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 19:50:16,698 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 19:50:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:16,714 INFO L93 Difference]: Finished difference Result 87 states and 122 transitions. [2022-11-02 19:50:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 19:50:16,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2022-11-02 19:50:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:16,716 INFO L225 Difference]: With dead ends: 87 [2022-11-02 19:50:16,716 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 19:50:16,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 19:50:16,717 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:16,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 19:50:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-11-02 19:50:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23) [2022-11-02 19:50:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2022-11-02 19:50:16,726 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 43 [2022-11-02 19:50:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:16,727 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2022-11-02 19:50:16,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-02 19:50:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2022-11-02 19:50:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 19:50:16,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:16,728 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:16,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:16,941 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:16,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 972082008, now seen corresponding path program 1 times [2022-11-02 19:50:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:16,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119569641] [2022-11-02 19:50:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:16,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:16,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:16,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:16,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 19:50:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:17,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:17,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 19:50:17,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:17,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119569641] [2022-11-02 19:50:17,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119569641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:17,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:17,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:17,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494374338] [2022-11-02 19:50:17,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:17,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:17,077 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:17,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:17,106 INFO L93 Difference]: Finished difference Result 113 states and 159 transitions. [2022-11-02 19:50:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:17,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-02 19:50:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:17,110 INFO L225 Difference]: With dead ends: 113 [2022-11-02 19:50:17,110 INFO L226 Difference]: Without dead ends: 88 [2022-11-02 19:50:17,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:17,111 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:17,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:17,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-02 19:50:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-02 19:50:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-11-02 19:50:17,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 127 transitions. [2022-11-02 19:50:17,129 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 127 transitions. Word has length 46 [2022-11-02 19:50:17,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:17,129 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 127 transitions. [2022-11-02 19:50:17,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 127 transitions. [2022-11-02 19:50:17,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 19:50:17,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:17,131 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:17,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:17,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:17,335 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:17,335 INFO L85 PathProgramCache]: Analyzing trace with hash 411048800, now seen corresponding path program 1 times [2022-11-02 19:50:17,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:17,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915772087] [2022-11-02 19:50:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:17,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:17,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:17,337 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:17,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 19:50:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:17,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:17,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 19:50:17,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:17,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:17,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915772087] [2022-11-02 19:50:17,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915772087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:17,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:17,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:17,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217008990] [2022-11-02 19:50:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:17,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:17,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:17,475 INFO L87 Difference]: Start difference. First operand 88 states and 127 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:17,520 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2022-11-02 19:50:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2022-11-02 19:50:17,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:17,526 INFO L225 Difference]: With dead ends: 117 [2022-11-02 19:50:17,526 INFO L226 Difference]: Without dead ends: 92 [2022-11-02 19:50:17,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:17,530 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:17,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-02 19:50:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-11-02 19:50:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-11-02 19:50:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 127 transitions. [2022-11-02 19:50:17,547 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 127 transitions. Word has length 47 [2022-11-02 19:50:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:17,548 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 127 transitions. [2022-11-02 19:50:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 127 transitions. [2022-11-02 19:50:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 19:50:17,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:17,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:17,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-02 19:50:17,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:17,768 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:17,769 INFO L85 PathProgramCache]: Analyzing trace with hash -877982242, now seen corresponding path program 1 times [2022-11-02 19:50:17,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323315227] [2022-11-02 19:50:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:17,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:17,771 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:17,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 19:50:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 19:50:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 19:50:18,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:18,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:18,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323315227] [2022-11-02 19:50:18,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323315227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:50:18,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1137006452] [2022-11-02 19:50:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:18,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-02 19:50:18,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/cvc4 [2022-11-02 19:50:18,159 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-02 19:50:18,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-02 19:50:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:18,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 19:50:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 19:50:18,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:18,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1137006452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 19:50:18,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:18,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-11-02 19:50:18,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303183466] [2022-11-02 19:50:18,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:18,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 19:50:18,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:18,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 19:50:18,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 19:50:18,655 INFO L87 Difference]: Start difference. First operand 88 states and 127 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 19:50:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:19,142 INFO L93 Difference]: Finished difference Result 123 states and 168 transitions. [2022-11-02 19:50:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 19:50:19,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-11-02 19:50:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:19,144 INFO L225 Difference]: With dead ends: 123 [2022-11-02 19:50:19,144 INFO L226 Difference]: Without dead ends: 102 [2022-11-02 19:50:19,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-02 19:50:19,145 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 68 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:19,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 309 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 19:50:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-02 19:50:19,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2022-11-02 19:50:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.25) internal successors, (80), 63 states have internal predecessors, (80), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-11-02 19:50:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2022-11-02 19:50:19,153 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 48 [2022-11-02 19:50:19,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:19,153 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2022-11-02 19:50:19,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 19:50:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2022-11-02 19:50:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 19:50:19,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:19,155 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:19,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:19,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:19,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:19,559 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1899050596, now seen corresponding path program 1 times [2022-11-02 19:50:19,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:19,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155387574] [2022-11-02 19:50:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:19,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:19,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:19,562 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:19,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 19:50:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 19:50:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 19:50:20,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:20,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:20,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155387574] [2022-11-02 19:50:20,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155387574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:20,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:20,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 19:50:20,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452584802] [2022-11-02 19:50:20,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:20,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 19:50:20,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 19:50:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-02 19:50:20,069 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-02 19:50:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:21,223 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2022-11-02 19:50:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 19:50:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2022-11-02 19:50:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:21,226 INFO L225 Difference]: With dead ends: 137 [2022-11-02 19:50:21,226 INFO L226 Difference]: Without dead ends: 135 [2022-11-02 19:50:21,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-02 19:50:21,227 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 91 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:21,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 513 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 19:50:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-02 19:50:21,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2022-11-02 19:50:21,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 72 states have internal predecessors, (92), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (34), 25 states have call predecessors, (34), 19 states have call successors, (34) [2022-11-02 19:50:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 145 transitions. [2022-11-02 19:50:21,240 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 145 transitions. Word has length 48 [2022-11-02 19:50:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:21,240 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 145 transitions. [2022-11-02 19:50:21,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-02 19:50:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 145 transitions. [2022-11-02 19:50:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 19:50:21,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:21,242 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:21,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:21,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:21,457 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:21,458 INFO L85 PathProgramCache]: Analyzing trace with hash 505566420, now seen corresponding path program 1 times [2022-11-02 19:50:21,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:21,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038777072] [2022-11-02 19:50:21,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:21,459 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:21,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:21,460 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:21,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 19:50:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:21,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:21,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 19:50:21,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:21,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038777072] [2022-11-02 19:50:21,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038777072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:21,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:21,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:21,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832983781] [2022-11-02 19:50:21,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:21,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:21,584 INFO L87 Difference]: Start difference. First operand 100 states and 145 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:21,611 INFO L93 Difference]: Finished difference Result 129 states and 185 transitions. [2022-11-02 19:50:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:21,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-11-02 19:50:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:21,613 INFO L225 Difference]: With dead ends: 129 [2022-11-02 19:50:21,613 INFO L226 Difference]: Without dead ends: 104 [2022-11-02 19:50:21,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:21,616 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:21,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:21,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-02 19:50:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-11-02 19:50:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 72 states have internal predecessors, (92), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (34), 25 states have call predecessors, (34), 19 states have call successors, (34) [2022-11-02 19:50:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 145 transitions. [2022-11-02 19:50:21,635 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 145 transitions. Word has length 48 [2022-11-02 19:50:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:21,636 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 145 transitions. [2022-11-02 19:50:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 145 transitions. [2022-11-02 19:50:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 19:50:21,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:21,638 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:21,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:21,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:21,852 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1437385679, now seen corresponding path program 1 times [2022-11-02 19:50:21,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:21,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221087076] [2022-11-02 19:50:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:21,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:21,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:21,854 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:21,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 19:50:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:21,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 19:50:21,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 19:50:22,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 19:50:22,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:22,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221087076] [2022-11-02 19:50:22,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221087076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:22,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:22,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-11-02 19:50:22,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377078496] [2022-11-02 19:50:22,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 19:50:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 19:50:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-02 19:50:22,498 INFO L87 Difference]: Start difference. First operand 100 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 19:50:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:22,982 INFO L93 Difference]: Finished difference Result 122 states and 170 transitions. [2022-11-02 19:50:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 19:50:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-11-02 19:50:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:22,983 INFO L225 Difference]: With dead ends: 122 [2022-11-02 19:50:22,983 INFO L226 Difference]: Without dead ends: 99 [2022-11-02 19:50:22,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-02 19:50:22,985 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 86 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:22,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 443 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 19:50:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-02 19:50:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-11-02 19:50:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (33), 23 states have call predecessors, (33), 19 states have call successors, (33) [2022-11-02 19:50:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 137 transitions. [2022-11-02 19:50:22,994 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 137 transitions. Word has length 48 [2022-11-02 19:50:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:22,995 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 137 transitions. [2022-11-02 19:50:22,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 19:50:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 137 transitions. [2022-11-02 19:50:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 19:50:22,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:22,996 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:23,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:23,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:23,211 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:23,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1803392071, now seen corresponding path program 1 times [2022-11-02 19:50:23,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:23,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137363614] [2022-11-02 19:50:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:23,214 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:23,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 19:50:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:23,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 19:50:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 19:50:23,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 19:50:23,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:23,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137363614] [2022-11-02 19:50:23,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137363614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:23,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:23,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-11-02 19:50:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689508739] [2022-11-02 19:50:23,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:23,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 19:50:23,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 19:50:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-02 19:50:23,959 INFO L87 Difference]: Start difference. First operand 95 states and 137 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-02 19:50:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:24,878 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2022-11-02 19:50:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 19:50:24,879 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 48 [2022-11-02 19:50:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:24,880 INFO L225 Difference]: With dead ends: 133 [2022-11-02 19:50:24,880 INFO L226 Difference]: Without dead ends: 89 [2022-11-02 19:50:24,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-02 19:50:24,881 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 48 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:24,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 530 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 19:50:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-02 19:50:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-11-02 19:50:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (27), 20 states have call predecessors, (27), 16 states have call successors, (27) [2022-11-02 19:50:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 119 transitions. [2022-11-02 19:50:24,889 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 119 transitions. Word has length 48 [2022-11-02 19:50:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:24,889 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 119 transitions. [2022-11-02 19:50:24,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-02 19:50:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 119 transitions. [2022-11-02 19:50:24,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 19:50:24,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:24,891 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:24,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:25,104 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash -495361713, now seen corresponding path program 1 times [2022-11-02 19:50:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:25,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396810567] [2022-11-02 19:50:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:25,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:25,106 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:25,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 19:50:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:25,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 19:50:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:25,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 19:50:25,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 19:50:25,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:25,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396810567] [2022-11-02 19:50:25,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396810567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:25,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:25,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-11-02 19:50:25,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831703331] [2022-11-02 19:50:25,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:25,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 19:50:25,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:25,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 19:50:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-02 19:50:25,662 INFO L87 Difference]: Start difference. First operand 86 states and 119 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 19:50:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:26,014 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2022-11-02 19:50:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 19:50:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 48 [2022-11-02 19:50:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:26,016 INFO L225 Difference]: With dead ends: 101 [2022-11-02 19:50:26,016 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 19:50:26,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-02 19:50:26,017 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 48 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:26,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 503 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 19:50:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 19:50:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-11-02 19:50:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 55 states have internal predecessors, (63), 13 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (24), 16 states have call predecessors, (24), 13 states have call successors, (24) [2022-11-02 19:50:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-11-02 19:50:26,024 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 48 [2022-11-02 19:50:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:26,025 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-11-02 19:50:26,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-02 19:50:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-11-02 19:50:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 19:50:26,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:26,026 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:26,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:26,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:26,239 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:26,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash 113915812, now seen corresponding path program 1 times [2022-11-02 19:50:26,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:26,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580771534] [2022-11-02 19:50:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:26,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:26,242 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:26,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 19:50:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 19:50:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 19:50:26,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-02 19:50:27,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:27,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580771534] [2022-11-02 19:50:27,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580771534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:27,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:27,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-02 19:50:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56576108] [2022-11-02 19:50:27,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:27,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 19:50:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 19:50:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-02 19:50:27,225 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-02 19:50:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:27,867 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2022-11-02 19:50:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 19:50:27,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 49 [2022-11-02 19:50:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:27,869 INFO L225 Difference]: With dead ends: 84 [2022-11-02 19:50:27,869 INFO L226 Difference]: Without dead ends: 72 [2022-11-02 19:50:27,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-11-02 19:50:27,871 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 81 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:27,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 309 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 19:50:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-02 19:50:27,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-11-02 19:50:27,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2022-11-02 19:50:27,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-11-02 19:50:27,877 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 49 [2022-11-02 19:50:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:27,877 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-11-02 19:50:27,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-02 19:50:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-11-02 19:50:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 19:50:27,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:27,879 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:27,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:28,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:28,083 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:28,084 INFO L85 PathProgramCache]: Analyzing trace with hash -552676772, now seen corresponding path program 1 times [2022-11-02 19:50:28,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:28,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798225865] [2022-11-02 19:50:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:28,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:28,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:28,088 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:28,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 19:50:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:28,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 19:50:28,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:28,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:28,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798225865] [2022-11-02 19:50:28,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798225865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:28,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:28,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:28,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284715758] [2022-11-02 19:50:28,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:28,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:28,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:28,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:28,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:28,193 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:28,228 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-11-02 19:50:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:28,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2022-11-02 19:50:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:28,229 INFO L225 Difference]: With dead ends: 96 [2022-11-02 19:50:28,229 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 19:50:28,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:28,230 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:28,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 199 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 19:50:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-11-02 19:50:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2022-11-02 19:50:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-11-02 19:50:28,247 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 49 [2022-11-02 19:50:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:28,247 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-11-02 19:50:28,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 19:50:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-11-02 19:50:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 19:50:28,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:28,248 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:28,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-02 19:50:28,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:28,451 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749125, now seen corresponding path program 1 times [2022-11-02 19:50:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:28,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117885148] [2022-11-02 19:50:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:28,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:28,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:28,453 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:28,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 19:50:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:28,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 19:50:28,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 19:50:29,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:29,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:29,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117885148] [2022-11-02 19:50:29,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117885148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:29,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:29,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-02 19:50:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022026329] [2022-11-02 19:50:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:29,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 19:50:29,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:29,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 19:50:29,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-02 19:50:29,169 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-02 19:50:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:30,203 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-11-02 19:50:30,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 19:50:30,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2022-11-02 19:50:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:30,209 INFO L225 Difference]: With dead ends: 90 [2022-11-02 19:50:30,209 INFO L226 Difference]: Without dead ends: 69 [2022-11-02 19:50:30,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-02 19:50:30,210 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 42 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:30,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 585 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 400 Invalid, 0 Unknown, 36 Unchecked, 0.6s Time] [2022-11-02 19:50:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-02 19:50:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-11-02 19:50:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-02 19:50:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-11-02 19:50:30,216 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 49 [2022-11-02 19:50:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:30,216 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-11-02 19:50:30,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-02 19:50:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-11-02 19:50:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-02 19:50:30,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:30,217 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:30,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:30,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:30,418 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:30,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1451512262, now seen corresponding path program 1 times [2022-11-02 19:50:30,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:30,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502800209] [2022-11-02 19:50:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:30,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:30,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:30,421 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:30,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 19:50:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:30,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 19:50:30,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 19:50:31,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-02 19:50:32,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:32,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502800209] [2022-11-02 19:50:32,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502800209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:32,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:32,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-11-02 19:50:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139674015] [2022-11-02 19:50:32,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 19:50:32,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:32,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 19:50:32,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-02 19:50:32,434 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 19:50:33,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 19:50:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:34,542 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2022-11-02 19:50:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 19:50:34,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 55 [2022-11-02 19:50:34,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:34,546 INFO L225 Difference]: With dead ends: 88 [2022-11-02 19:50:34,547 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 19:50:34,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-11-02 19:50:34,548 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 131 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:34,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 261 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 307 Invalid, 0 Unknown, 24 Unchecked, 1.7s Time] [2022-11-02 19:50:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 19:50:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-11-02 19:50:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-02 19:50:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-11-02 19:50:34,553 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 55 [2022-11-02 19:50:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:34,554 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-11-02 19:50:34,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-02 19:50:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-11-02 19:50:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 19:50:34,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:34,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:34,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-02 19:50:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:34,771 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2059347801, now seen corresponding path program 1 times [2022-11-02 19:50:34,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:34,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936614094] [2022-11-02 19:50:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:34,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:34,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:34,773 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:34,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 19:50:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:34,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 19:50:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 19:50:35,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:35,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:35,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936614094] [2022-11-02 19:50:35,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936614094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:35,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:35,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 19:50:35,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408584343] [2022-11-02 19:50:35,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:35,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 19:50:35,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:35,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 19:50:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 19:50:35,042 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:35,250 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-11-02 19:50:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 19:50:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-11-02 19:50:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:35,252 INFO L225 Difference]: With dead ends: 65 [2022-11-02 19:50:35,252 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 19:50:35,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 19:50:35,253 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:35,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 226 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 19:50:35,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 19:50:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-02 19:50:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-02 19:50:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-11-02 19:50:35,257 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 62 [2022-11-02 19:50:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:35,257 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-11-02 19:50:35,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-11-02 19:50:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 19:50:35,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:35,258 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:35,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-11-02 19:50:35,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:35,468 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:35,468 INFO L85 PathProgramCache]: Analyzing trace with hash 253909467, now seen corresponding path program 1 times [2022-11-02 19:50:35,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:35,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481564774] [2022-11-02 19:50:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:35,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:35,469 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:35,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 19:50:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 19:50:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 19:50:35,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:35,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:35,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481564774] [2022-11-02 19:50:35,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481564774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:35,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:35,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 19:50:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276890367] [2022-11-02 19:50:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 19:50:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 19:50:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 19:50:35,813 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:36,262 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-11-02 19:50:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 19:50:36,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-11-02 19:50:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:36,263 INFO L225 Difference]: With dead ends: 69 [2022-11-02 19:50:36,263 INFO L226 Difference]: Without dead ends: 50 [2022-11-02 19:50:36,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 19:50:36,264 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:36,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 251 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 19:50:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-02 19:50:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-02 19:50:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-02 19:50:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-02 19:50:36,268 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 62 [2022-11-02 19:50:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:36,269 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-02 19:50:36,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-02 19:50:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 19:50:36,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:36,270 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:36,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:36,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:36,470 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash 647887735, now seen corresponding path program 1 times [2022-11-02 19:50:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:36,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021590484] [2022-11-02 19:50:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:36,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:36,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:36,472 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:36,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 19:50:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:36,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 19:50:36,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 19:50:36,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:36,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:36,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021590484] [2022-11-02 19:50:36,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021590484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:36,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:36,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 19:50:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190696797] [2022-11-02 19:50:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:36,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 19:50:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:36,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 19:50:36,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 19:50:36,860 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:37,292 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-11-02 19:50:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 19:50:37,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2022-11-02 19:50:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:37,294 INFO L225 Difference]: With dead ends: 71 [2022-11-02 19:50:37,294 INFO L226 Difference]: Without dead ends: 52 [2022-11-02 19:50:37,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 19:50:37,300 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:37,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 257 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-11-02 19:50:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-02 19:50:37,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-11-02 19:50:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-02 19:50:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-02 19:50:37,306 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 63 [2022-11-02 19:50:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:37,306 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-02 19:50:37,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-02 19:50:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 19:50:37,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:37,308 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:37,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:37,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:37,515 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash -589254976, now seen corresponding path program 1 times [2022-11-02 19:50:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269498517] [2022-11-02 19:50:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:37,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:37,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:37,517 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:37,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 19:50:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:37,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 19:50:37,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 19:50:38,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 19:50:38,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269498517] [2022-11-02 19:50:38,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269498517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:38,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:38,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-02 19:50:38,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823011416] [2022-11-02 19:50:38,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:38,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 19:50:38,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:38,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 19:50:38,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-02 19:50:38,706 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 19:50:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:39,440 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2022-11-02 19:50:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 19:50:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 63 [2022-11-02 19:50:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:39,441 INFO L225 Difference]: With dead ends: 84 [2022-11-02 19:50:39,441 INFO L226 Difference]: Without dead ends: 71 [2022-11-02 19:50:39,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-02 19:50:39,442 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:39,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 519 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 19:50:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-02 19:50:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2022-11-02 19:50:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-02 19:50:39,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-11-02 19:50:39,448 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 63 [2022-11-02 19:50:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:39,449 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-11-02 19:50:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-02 19:50:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-11-02 19:50:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 19:50:39,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:39,450 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:39,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:39,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:39,650 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash -472199073, now seen corresponding path program 1 times [2022-11-02 19:50:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:39,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [351693486] [2022-11-02 19:50:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:39,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:39,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:39,652 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:39,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 19:50:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:39,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 19:50:39,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 19:50:40,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:40,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [351693486] [2022-11-02 19:50:40,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [351693486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:40,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:40,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 19:50:40,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952664365] [2022-11-02 19:50:40,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:40,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 19:50:40,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 19:50:40,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 19:50:40,067 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:40,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:40,499 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-02 19:50:40,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 19:50:40,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2022-11-02 19:50:40,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:40,500 INFO L225 Difference]: With dead ends: 75 [2022-11-02 19:50:40,500 INFO L226 Difference]: Without dead ends: 56 [2022-11-02 19:50:40,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 19:50:40,501 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:40,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 257 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-11-02 19:50:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-02 19:50:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-11-02 19:50:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-02 19:50:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-11-02 19:50:40,507 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 64 [2022-11-02 19:50:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:40,507 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-11-02 19:50:40,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-11-02 19:50:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 19:50:40,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:40,509 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:40,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-02 19:50:40,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:40,715 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1512938488, now seen corresponding path program 1 times [2022-11-02 19:50:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:40,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762454403] [2022-11-02 19:50:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:40,716 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:40,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:40,717 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:40,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 19:50:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 19:50:40,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-02 19:50:41,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 19:50:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-02 19:50:41,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:41,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762454403] [2022-11-02 19:50:41,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762454403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 19:50:41,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 19:50:41,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-02 19:50:41,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649908786] [2022-11-02 19:50:41,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 19:50:41,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 19:50:41,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:41,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 19:50:41,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-02 19:50:41,685 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-02 19:50:42,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:42,519 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-11-02 19:50:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 19:50:42,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2022-11-02 19:50:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:42,520 INFO L225 Difference]: With dead ends: 68 [2022-11-02 19:50:42,520 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 19:50:42,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-11-02 19:50:42,522 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 112 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:42,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 229 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 19:50:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 19:50:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-11-02 19:50:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-02 19:50:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-11-02 19:50:42,527 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 64 [2022-11-02 19:50:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:42,527 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-11-02 19:50:42,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-02 19:50:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-11-02 19:50:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 19:50:42,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:42,529 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:42,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-02 19:50:42,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:42,735 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1283662981, now seen corresponding path program 1 times [2022-11-02 19:50:42,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:42,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363409418] [2022-11-02 19:50:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:42,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:42,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:42,737 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:42,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-02 19:50:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 19:50:42,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 19:50:43,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:43,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:43,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363409418] [2022-11-02 19:50:43,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363409418] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:43,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:43,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 19:50:43,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416680532] [2022-11-02 19:50:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:43,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 19:50:43,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 19:50:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-02 19:50:43,051 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:43,532 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-11-02 19:50:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 19:50:43,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2022-11-02 19:50:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:43,534 INFO L225 Difference]: With dead ends: 68 [2022-11-02 19:50:43,534 INFO L226 Difference]: Without dead ends: 49 [2022-11-02 19:50:43,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 19:50:43,535 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:43,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 249 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 19:50:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-02 19:50:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-11-02 19:50:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 19:50:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-02 19:50:43,539 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 65 [2022-11-02 19:50:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:43,540 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-02 19:50:43,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-02 19:50:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-02 19:50:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 19:50:43,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 19:50:43,541 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 19:50:43,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-02 19:50:43,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:43,755 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 19:50:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 19:50:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash -322048964, now seen corresponding path program 1 times [2022-11-02 19:50:43,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 19:50:43,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389933144] [2022-11-02 19:50:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 19:50:43,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 19:50:43,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 19:50:43,757 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 19:50:43,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-02 19:50:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 19:50:43,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 19:50:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 19:50:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 19:50:43,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 19:50:43,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 19:50:43,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389933144] [2022-11-02 19:50:43,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389933144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 19:50:43,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 19:50:43,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 19:50:43,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007394216] [2022-11-02 19:50:43,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 19:50:43,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 19:50:43,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 19:50:43,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 19:50:43,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:43,879 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 19:50:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 19:50:43,913 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-02 19:50:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 19:50:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-11-02 19:50:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 19:50:43,914 INFO L225 Difference]: With dead ends: 50 [2022-11-02 19:50:43,914 INFO L226 Difference]: Without dead ends: 0 [2022-11-02 19:50:43,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 19:50:43,915 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 19:50:43,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 19:50:43,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-02 19:50:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-02 19:50:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 19:50:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-02 19:50:43,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2022-11-02 19:50:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 19:50:43,916 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 19:50:43,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 19:50:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-02 19:50:43,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-02 19:50:43,919 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-02 19:50:43,920 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 19:50:43,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-02 19:50:44,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 19:50:44,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-02 19:50:45,303 INFO L899 garLoopResultBuilder]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2022-11-02 19:50:45,304 INFO L902 garLoopResultBuilder]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2022-11-02 19:50:45,304 INFO L899 garLoopResultBuilder]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2022-11-02 19:50:45,304 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 82) no Hoare annotation was computed. [2022-11-02 19:50:45,304 INFO L895 garLoopResultBuilder]: At program point L81(line 81) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|))) (or (and .cse0 (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2022-11-02 19:50:45,305 INFO L899 garLoopResultBuilder]: For program point L81-1(line 81) no Hoare annotation was computed. [2022-11-02 19:50:45,305 INFO L899 garLoopResultBuilder]: For program point L81-2(line 81) no Hoare annotation was computed. [2022-11-02 19:50:45,305 INFO L895 garLoopResultBuilder]: At program point L81-3(line 81) the Hoare annotation is: (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) [2022-11-02 19:50:45,305 INFO L899 garLoopResultBuilder]: For program point L81-4(line 81) no Hoare annotation was computed. [2022-11-02 19:50:45,305 INFO L899 garLoopResultBuilder]: For program point L81-6(lines 81 84) no Hoare annotation was computed. [2022-11-02 19:50:45,305 INFO L902 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: true [2022-11-02 19:50:45,306 INFO L899 garLoopResultBuilder]: For program point L69-1(line 69) no Hoare annotation was computed. [2022-11-02 19:50:45,306 INFO L899 garLoopResultBuilder]: For program point L69-2(line 69) no Hoare annotation was computed. [2022-11-02 19:50:45,306 INFO L895 garLoopResultBuilder]: At program point L69-3(line 69) the Hoare annotation is: (and (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) |ULTIMATE.start_main_#t~short12#1| (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) [2022-11-02 19:50:45,306 INFO L899 garLoopResultBuilder]: For program point L69-4(line 69) no Hoare annotation was computed. [2022-11-02 19:50:45,306 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-02 19:50:45,306 INFO L899 garLoopResultBuilder]: For program point L69-6(line 69) no Hoare annotation was computed. [2022-11-02 19:50:45,307 INFO L899 garLoopResultBuilder]: For program point L69-7(lines 69 70) no Hoare annotation was computed. [2022-11-02 19:50:45,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-02 19:50:45,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-02 19:50:45,307 INFO L899 garLoopResultBuilder]: For program point L69-9(lines 69 85) no Hoare annotation was computed. [2022-11-02 19:50:45,307 INFO L899 garLoopResultBuilder]: For program point L69-11(lines 69 85) no Hoare annotation was computed. [2022-11-02 19:50:45,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 76) no Hoare annotation was computed. [2022-11-02 19:50:45,307 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-11-02 19:50:45,308 INFO L899 garLoopResultBuilder]: For program point L53-2(line 53) no Hoare annotation was computed. [2022-11-02 19:50:45,308 INFO L895 garLoopResultBuilder]: At program point L53-3(lines 45 54) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~x#1|)) (not .cse1) (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2022-11-02 19:50:45,308 INFO L899 garLoopResultBuilder]: For program point L82(line 82) no Hoare annotation was computed. [2022-11-02 19:50:45,312 INFO L895 garLoopResultBuilder]: At program point L70(line 70) the Hoare annotation is: (let ((.cse0 (not |ULTIMATE.start_main_#t~short12#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (not |ULTIMATE.start_main_#t~short16#1|))) (or (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) (= |ULTIMATE.start_main_#t~ret11#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (not .cse1) .cse2) (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) .cse1 .cse2))) [2022-11-02 19:50:45,313 INFO L899 garLoopResultBuilder]: For program point L70-1(line 70) no Hoare annotation was computed. [2022-11-02 19:50:45,313 INFO L899 garLoopResultBuilder]: For program point L70-2(line 70) no Hoare annotation was computed. [2022-11-02 19:50:45,314 INFO L895 garLoopResultBuilder]: At program point L70-3(line 70) the Hoare annotation is: (and (not |ULTIMATE.start_main_#t~short12#1|) |ULTIMATE.start_main_#t~short15#1| (= |ULTIMATE.start_main_#t~ret13#1| (_ bv0 32)) (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (not |ULTIMATE.start_main_#t~short16#1|)) [2022-11-02 19:50:45,314 INFO L899 garLoopResultBuilder]: For program point L70-4(line 70) no Hoare annotation was computed. [2022-11-02 19:50:45,314 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-02 19:50:45,314 INFO L899 garLoopResultBuilder]: For program point L70-6(line 70) no Hoare annotation was computed. [2022-11-02 19:50:45,314 INFO L902 garLoopResultBuilder]: At program point L87(lines 59 88) the Hoare annotation is: true [2022-11-02 19:50:45,315 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~x#1|)) (not .cse1) .cse2) (and .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not .cse2)))) [2022-11-02 19:50:45,315 INFO L899 garLoopResultBuilder]: For program point L50-1(lines 50 52) no Hoare annotation was computed. [2022-11-02 19:50:45,315 INFO L895 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~x#1|)) (not .cse1) .cse2) (and .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not .cse2)))) [2022-11-02 19:50:45,315 INFO L899 garLoopResultBuilder]: For program point L46-1(lines 46 48) no Hoare annotation was computed. [2022-11-02 19:50:45,315 INFO L895 garLoopResultBuilder]: At program point L75(line 75) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (and .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~x#1|)) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (not .cse1) (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)))) [2022-11-02 19:50:45,316 INFO L899 garLoopResultBuilder]: For program point L75-1(line 75) no Hoare annotation was computed. [2022-11-02 19:50:45,316 INFO L899 garLoopResultBuilder]: For program point L75-2(line 75) no Hoare annotation was computed. [2022-11-02 19:50:45,316 INFO L895 garLoopResultBuilder]: At program point L75-3(line 75) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short20#1| (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) [2022-11-02 19:50:45,316 INFO L899 garLoopResultBuilder]: For program point L75-4(line 75) no Hoare annotation was computed. [2022-11-02 19:50:45,316 INFO L899 garLoopResultBuilder]: For program point L75-6(lines 75 78) no Hoare annotation was computed. [2022-11-02 19:50:45,316 INFO L899 garLoopResultBuilder]: For program point L76(line 76) no Hoare annotation was computed. [2022-11-02 19:50:45,317 INFO L899 garLoopResultBuilder]: For program point L33(lines 33 42) no Hoare annotation was computed. [2022-11-02 19:50:45,317 INFO L899 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 22 43) no Hoare annotation was computed. [2022-11-02 19:50:45,317 INFO L899 garLoopResultBuilder]: For program point L25-1(lines 25 29) no Hoare annotation was computed. [2022-11-02 19:50:45,317 INFO L895 garLoopResultBuilder]: At program point L25-2(lines 25 29) the Hoare annotation is: (= |__fpclassify_float_#in~x| __fpclassify_float_~x) [2022-11-02 19:50:45,318 INFO L899 garLoopResultBuilder]: For program point L25-3(lines 22 43) no Hoare annotation was computed. [2022-11-02 19:50:45,319 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 42) no Hoare annotation was computed. [2022-11-02 19:50:45,319 INFO L902 garLoopResultBuilder]: At program point __fpclassify_floatENTRY(lines 22 43) the Hoare annotation is: true [2022-11-02 19:50:45,319 INFO L899 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 22 43) no Hoare annotation was computed. [2022-11-02 19:50:45,319 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-11-02 19:50:45,323 INFO L444 BasicCegarLoop]: Path program 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] [2022-11-02 19:50:45,325 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 19:50:45,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 07:50:45 BoogieIcfgContainer [2022-11-02 19:50:45,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 19:50:45,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 19:50:45,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 19:50:45,347 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 19:50:45,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 07:50:08" (3/4) ... [2022-11-02 19:50:45,351 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-02 19:50:45,360 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2022-11-02 19:50:45,361 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2022-11-02 19:50:45,367 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-11-02 19:50:45,368 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-11-02 19:50:45,368 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-02 19:50:45,369 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-02 19:50:45,401 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2022-11-02 19:50:45,401 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((y == y && !~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(x, x)) && \result == y) && ~fp.eq~FLOAT(y, y)) || ((((\result == x && y == y) && ~fp.eq~FLOAT(x, x)) && x == x) && !~fp.eq~FLOAT(y, y)) [2022-11-02 19:50:45,427 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/witness.graphml [2022-11-02 19:50:45,428 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 19:50:45,428 INFO L158 Benchmark]: Toolchain (without parser) took 37836.84ms. Allocated memory was 81.8MB in the beginning and 109.1MB in the end (delta: 27.3MB). Free memory was 59.6MB in the beginning and 75.5MB in the end (delta: -15.9MB). Peak memory consumption was 13.3MB. Max. memory is 16.1GB. [2022-11-02 19:50:45,429 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 54.5MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 19:50:45,429 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.62ms. Allocated memory is still 81.8MB. Free memory was 59.4MB in the beginning and 48.3MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 19:50:45,429 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.87ms. Allocated memory is still 81.8MB. Free memory was 48.3MB in the beginning and 46.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 19:50:45,432 INFO L158 Benchmark]: Boogie Preprocessor took 35.80ms. Allocated memory is still 81.8MB. Free memory was 46.5MB in the beginning and 44.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 19:50:45,433 INFO L158 Benchmark]: RCFGBuilder took 676.18ms. Allocated memory is still 81.8MB. Free memory was 44.9MB in the beginning and 51.1MB in the end (delta: -6.2MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2022-11-02 19:50:45,433 INFO L158 Benchmark]: TraceAbstraction took 36737.11ms. Allocated memory was 81.8MB in the beginning and 109.1MB in the end (delta: 27.3MB). Free memory was 50.6MB in the beginning and 78.6MB in the end (delta: -28.1MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. [2022-11-02 19:50:45,435 INFO L158 Benchmark]: Witness Printer took 80.89ms. Allocated memory is still 109.1MB. Free memory was 78.6MB in the beginning and 75.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-02 19:50:45,437 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 54.5MB. Free memory was 34.7MB in the beginning and 34.6MB in the end (delta: 38.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.62ms. Allocated memory is still 81.8MB. Free memory was 59.4MB in the beginning and 48.3MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.87ms. Allocated memory is still 81.8MB. Free memory was 48.3MB in the beginning and 46.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.80ms. Allocated memory is still 81.8MB. Free memory was 46.5MB in the beginning and 44.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 676.18ms. Allocated memory is still 81.8MB. Free memory was 44.9MB in the beginning and 51.1MB in the end (delta: -6.2MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * TraceAbstraction took 36737.11ms. Allocated memory was 81.8MB in the beginning and 109.1MB in the end (delta: 27.3MB). Free memory was 50.6MB in the beginning and 78.6MB in the end (delta: -28.1MB). Peak memory consumption was 54.1MB. Max. memory is 16.1GB. * Witness Printer took 80.89ms. Allocated memory is still 109.1MB. Free memory was 78.6MB in the beginning and 75.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 82]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 36.6s, OverallIterations: 30, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 13.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1332 SdHoareTripleChecker+Valid, 9.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1257 mSDsluCounter, 9173 SdHoareTripleChecker+Invalid, 8.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 108 IncrementalHoareTripleChecker+Unchecked, 7355 mSDsCounter, 334 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4147 IncrementalHoareTripleChecker+Invalid, 4589 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 334 mSolverCounterUnsat, 1818 mSDtfsCounter, 4147 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2044 GetRequests, 1738 SyntacticMatches, 2 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, InterpolantAutomatonStates: 243, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 30 MinimizatonAttempts, 209 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 137 PreInvPairs, 163 NumberOfFragments, 264 HoareAnnotationTreeSize, 137 FomulaSimplifications, 1064 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 1513 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 1490 NumberOfCodeBlocks, 1490 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1902 ConstructedInterpolants, 9 QuantifiedInterpolants, 5593 SizeOfPredicates, 152 NumberOfNonLiveVariables, 3436 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 40 InterpolantComputations, 20 PerfectInterpolantSequences, 1033/1145 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: ((((y == y && !~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(x, x)) && \result == y) && ~fp.eq~FLOAT(y, y)) || ((((\result == x && y == y) && ~fp.eq~FLOAT(x, x)) && x == x) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: \old(x) == x RESULT: Ultimate proved your program to be correct! [2022-11-02 19:50:45,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87930c66-1db7-4c4f-8e05-fb339938b673/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE