./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/rekh_ctm.4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/rekh_ctm.4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL --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 436e6e57c04bd43264564f478c3aa92ec3799e6c36d71ae9bac6692f2873338f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:24:35,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:24:35,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:24:36,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:24:36,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:24:36,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:24:36,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:24:36,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:24:36,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:24:36,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:24:36,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:24:36,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:24:36,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:24:36,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:24:36,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:24:36,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:24:36,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:24:36,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:24:36,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:24:36,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:24:36,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:24:36,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:24:36,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:24:36,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:24:36,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:24:36,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:24:36,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:24:36,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:24:36,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:24:36,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:24:36,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:24:36,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:24:36,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:24:36,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:24:36,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:24:36,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:24:36,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:24:36,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:24:36,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:24:36,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:24:36,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:24:36,117 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:24:36,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:24:36,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:24:36,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:24:36,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:24:36,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:24:36,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:24:36,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:24:36,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:24:36,167 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:24:36,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:24:36,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:24:36,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:24:36,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:24:36,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:24:36,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:24:36,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:24:36,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:24:36,169 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:24:36,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:24:36,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:24:36,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:24:36,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:24:36,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:24:36,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:24:36,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:24:36,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:24:36,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:24:36,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:24:36,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:24:36,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:24:36,174 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:24:36,174 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:24:36,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:24:36,174 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:24:36,174 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_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 436e6e57c04bd43264564f478c3aa92ec3799e6c36d71ae9bac6692f2873338f [2021-11-19 05:24:36,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:24:36,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:24:36,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:24:36,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:24:36,463 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:24:36,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/seq-mthreaded/rekh_ctm.4.c [2021-11-19 05:24:36,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/data/7a1ee76e3/ed7be393a1f5437dbcf1de8686f8823b/FLAG48b309eb1 [2021-11-19 05:24:37,276 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:24:37,276 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/sv-benchmarks/c/seq-mthreaded/rekh_ctm.4.c [2021-11-19 05:24:37,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/data/7a1ee76e3/ed7be393a1f5437dbcf1de8686f8823b/FLAG48b309eb1 [2021-11-19 05:24:37,415 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/data/7a1ee76e3/ed7be393a1f5437dbcf1de8686f8823b [2021-11-19 05:24:37,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:24:37,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:24:37,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:24:37,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:24:37,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:24:37,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:37" (1/1) ... [2021-11-19 05:24:37,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7831d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:37, skipping insertion in model container [2021-11-19 05:24:37,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:24:37" (1/1) ... [2021-11-19 05:24:37,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:24:37,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:24:37,863 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_7b55161d-79a2-42ed-97e1-ce84adaacad7/sv-benchmarks/c/seq-mthreaded/rekh_ctm.4.c[1868,1881] [2021-11-19 05:24:38,462 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:24:38,490 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:24:38,507 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_7b55161d-79a2-42ed-97e1-ce84adaacad7/sv-benchmarks/c/seq-mthreaded/rekh_ctm.4.c[1868,1881] [2021-11-19 05:24:38,772 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:24:38,848 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:24:38,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38 WrapperNode [2021-11-19 05:24:38,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:24:38,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:24:38,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:24:38,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:24:38,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:38,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,127 INFO L137 Inliner]: procedures = 100, calls = 2906, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 8464 [2021-11-19 05:24:39,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:24:39,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:24:39,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:24:39,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:24:39,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:24:39,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:24:39,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:24:39,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:24:39,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (1/1) ... [2021-11-19 05:24:39,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:24:39,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:24:39,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:24:39,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:24:39,665 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_state [2021-11-19 05:24:39,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_state [2021-11-19 05:24:39,665 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_state [2021-11-19 05:24:39,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_state [2021-11-19 05:24:39,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:24:39,666 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_need_to_run_nxtbg [2021-11-19 05:24:39,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_need_to_run_nxtbg [2021-11-19 05:24:39,666 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_set_count [2021-11-19 05:24:39,666 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_set_count [2021-11-19 05:24:39,666 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write___startrek_current_priority [2021-11-19 05:24:39,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write___startrek_current_priority [2021-11-19 05:24:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_input [2021-11-19 05:24:39,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_input [2021-11-19 05:24:39,667 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_hyperperiod [2021-11-19 05:24:39,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_hyperperiod [2021-11-19 05:24:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure bg_nxtcolorsensor [2021-11-19 05:24:39,668 INFO L138 BoogieDeclarations]: Found implementation of procedure bg_nxtcolorsensor [2021-11-19 05:24:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Writer [2021-11-19 05:24:39,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Writer [2021-11-19 05:24:39,668 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtcolorsensor_mode [2021-11-19 05:24:39,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtcolorsensor_mode [2021-11-19 05:24:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:24:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-11-19 05:24:39,669 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-11-19 05:24:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_count [2021-11-19 05:24:39,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_count [2021-11-19 05:24:39,669 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_T_state [2021-11-19 05:24:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_T_state [2021-11-19 05:24:39,670 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_output [2021-11-19 05:24:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_output [2021-11-19 05:24:39,670 INFO L130 BoogieDeclarations]: Found specification of procedure move_motor [2021-11-19 05:24:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure move_motor [2021-11-19 05:24:39,670 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_speed [2021-11-19 05:24:39,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_speed [2021-11-19 05:24:39,671 INFO L130 BoogieDeclarations]: Found specification of procedure nxt_motor_get_count [2021-11-19 05:24:39,671 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt_motor_get_count [2021-11-19 05:24:39,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:24:39,671 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t2 [2021-11-19 05:24:39,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t2 [2021-11-19 05:24:39,672 INFO L130 BoogieDeclarations]: Found specification of procedure ecrobot_set_nxtcolorsensor [2021-11-19 05:24:39,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ecrobot_set_nxtcolorsensor [2021-11-19 05:24:39,672 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t3 [2021-11-19 05:24:39,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t3 [2021-11-19 05:24:39,672 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_output [2021-11-19 05:24:39,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_output [2021-11-19 05:24:39,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:24:39,673 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t0 [2021-11-19 05:24:39,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t0 [2021-11-19 05:24:39,673 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_T_count [2021-11-19 05:24:39,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_T_count [2021-11-19 05:24:39,674 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_cs_t1 [2021-11-19 05:24:39,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_cs_t1 [2021-11-19 05:24:39,674 INFO L130 BoogieDeclarations]: Found specification of procedure TerminateTask [2021-11-19 05:24:39,675 INFO L138 BoogieDeclarations]: Found implementation of procedure TerminateTask [2021-11-19 05:24:39,676 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_W_count [2021-11-19 05:24:39,676 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_W_count [2021-11-19 05:24:39,677 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read___startrek_current_priority [2021-11-19 05:24:39,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read___startrek_current_priority [2021-11-19 05:24:39,677 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_count [2021-11-19 05:24:39,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_count [2021-11-19 05:24:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_count [2021-11-19 05:24:39,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_count [2021-11-19 05:24:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_T_speed [2021-11-19 05:24:39,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_T_speed [2021-11-19 05:24:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_nxtcolorsensor_data_mode [2021-11-19 05:24:39,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_nxtcolorsensor_data_mode [2021-11-19 05:24:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_threshold [2021-11-19 05:24:39,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_threshold [2021-11-19 05:24:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_need_to_read [2021-11-19 05:24:39,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_need_to_read [2021-11-19 05:24:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_R_state [2021-11-19 05:24:39,679 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_R_state [2021-11-19 05:24:39,680 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Reader [2021-11-19 05:24:39,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Reader [2021-11-19 05:24:39,681 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_dir [2021-11-19 05:24:39,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_dir [2021-11-19 05:24:39,681 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_W_speed [2021-11-19 05:24:39,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_W_speed [2021-11-19 05:24:39,681 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_input [2021-11-19 05:24:39,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_input [2021-11-19 05:24:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_R_state [2021-11-19 05:24:39,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_R_state [2021-11-19 05:24:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_read_need_to_run_nxtbg [2021-11-19 05:24:39,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_read_need_to_run_nxtbg [2021-11-19 05:24:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_W_state [2021-11-19 05:24:39,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_W_state [2021-11-19 05:24:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_write_R_count [2021-11-19 05:24:39,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_write_R_count [2021-11-19 05:24:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_TapeMover [2021-11-19 05:24:39,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_TapeMover [2021-11-19 05:24:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:24:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure __startrek_entry_pt_Controller [2021-11-19 05:24:39,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __startrek_entry_pt_Controller [2021-11-19 05:24:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:24:39,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:24:40,340 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:24:40,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:25:03,839 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:25:03,880 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:25:03,880 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 05:25:03,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:25:03 BoogieIcfgContainer [2021-11-19 05:25:03,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:25:03,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:25:03,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:25:03,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:25:03,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:24:37" (1/3) ... [2021-11-19 05:25:03,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156aa9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:25:03, skipping insertion in model container [2021-11-19 05:25:03,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:24:38" (2/3) ... [2021-11-19 05:25:03,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156aa9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:25:03, skipping insertion in model container [2021-11-19 05:25:03,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:25:03" (3/3) ... [2021-11-19 05:25:03,896 INFO L111 eAbstractionObserver]: Analyzing ICFG rekh_ctm.4.c [2021-11-19 05:25:03,901 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:25:03,901 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:25:03,958 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:25:03,966 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:25:03,966 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:25:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 2469 states, 2115 states have (on average 1.4799054373522458) internal successors, (3130), 2139 states have internal predecessors, (3130), 308 states have call successors, (308), 44 states have call predecessors, (308), 44 states have return successors, (308), 298 states have call predecessors, (308), 308 states have call successors, (308) [2021-11-19 05:25:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 05:25:04,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:04,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:04,081 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:04,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:04,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1151272851, now seen corresponding path program 1 times [2021-11-19 05:25:04,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:04,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627489467] [2021-11-19 05:25:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:04,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:25:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:25:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:25:04,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:04,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627489467] [2021-11-19 05:25:04,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627489467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:04,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:04,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:25:04,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991958594] [2021-11-19 05:25:04,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:04,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:25:04,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:25:04,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:25:04,819 INFO L87 Difference]: Start difference. First operand has 2469 states, 2115 states have (on average 1.4799054373522458) internal successors, (3130), 2139 states have internal predecessors, (3130), 308 states have call successors, (308), 44 states have call predecessors, (308), 44 states have return successors, (308), 298 states have call predecessors, (308), 308 states have call successors, (308) Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:25:06,899 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:09,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:11,457 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:25:16,123 INFO L93 Difference]: Finished difference Result 5692 states and 9395 transitions. [2021-11-19 05:25:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:25:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 148 [2021-11-19 05:25:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:25:16,195 INFO L225 Difference]: With dead ends: 5692 [2021-11-19 05:25:16,195 INFO L226 Difference]: Without dead ends: 3215 [2021-11-19 05:25:16,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:25:16,317 INFO L933 BasicCegarLoop]: 3114 mSDtfsCounter, 1684 mSDsluCounter, 2164 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 1217 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 5278 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1217 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:25:16,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 5278 Invalid, 2815 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1217 Valid, 1596 Invalid, 2 Unknown, 0 Unchecked, 10.8s Time] [2021-11-19 05:25:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-11-19 05:25:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2456. [2021-11-19 05:25:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2103 states have (on average 1.1535901093675702) internal successors, (2426), 2127 states have internal predecessors, (2426), 308 states have call successors, (308), 44 states have call predecessors, (308), 44 states have return successors, (307), 297 states have call predecessors, (307), 307 states have call successors, (307) [2021-11-19 05:25:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3041 transitions. [2021-11-19 05:25:16,645 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3041 transitions. Word has length 148 [2021-11-19 05:25:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:25:16,647 INFO L470 AbstractCegarLoop]: Abstraction has 2456 states and 3041 transitions. [2021-11-19 05:25:16,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:25:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3041 transitions. [2021-11-19 05:25:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-19 05:25:16,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:25:16,667 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:25:16,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:25:16,668 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:25:16,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:25:16,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1991090307, now seen corresponding path program 1 times [2021-11-19 05:25:16,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:25:16,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899684308] [2021-11-19 05:25:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:25:16,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:25:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:25:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:25:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:25:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 05:25:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:25:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:25:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 05:25:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:25:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:25:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:25:17,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:25:17,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899684308] [2021-11-19 05:25:17,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899684308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:25:17,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:25:17,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:25:17,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210089057] [2021-11-19 05:25:17,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:25:17,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:25:17,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:25:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:25:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:25:17,521 INFO L87 Difference]: Start difference. First operand 2456 states and 3041 transitions. Second operand has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:25:18,640 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:20,955 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:23,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:25,181 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:27,426 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:43,300 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:44,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:46,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:48,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:50,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:52,908 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:54,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:57,056 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:25:59,138 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:01,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:03,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:26:03,343 INFO L93 Difference]: Finished difference Result 6533 states and 8783 transitions. [2021-11-19 05:26:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:26:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 208 [2021-11-19 05:26:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:26:03,385 INFO L225 Difference]: With dead ends: 6533 [2021-11-19 05:26:03,385 INFO L226 Difference]: Without dead ends: 4082 [2021-11-19 05:26:03,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:26:03,422 INFO L933 BasicCegarLoop]: 3243 mSDtfsCounter, 8161 mSDsluCounter, 6239 mSDsCounter, 0 mSdLazyCounter, 7153 mSolverCounterSat, 3382 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8297 SdHoareTripleChecker+Valid, 9482 SdHoareTripleChecker+Invalid, 10547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3382 IncrementalHoareTripleChecker+Valid, 7153 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:26:03,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8297 Valid, 9482 Invalid, 10547 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3382 Valid, 7153 Invalid, 12 Unknown, 0 Unchecked, 45.0s Time] [2021-11-19 05:26:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-11-19 05:26:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 2979. [2021-11-19 05:26:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2478 states have (on average 1.1864406779661016) internal successors, (2940), 2508 states have internal predecessors, (2940), 423 states have call successors, (423), 77 states have call predecessors, (423), 77 states have return successors, (422), 408 states have call predecessors, (422), 422 states have call successors, (422) [2021-11-19 05:26:03,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 3785 transitions. [2021-11-19 05:26:03,648 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 3785 transitions. Word has length 208 [2021-11-19 05:26:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:26:03,652 INFO L470 AbstractCegarLoop]: Abstraction has 2979 states and 3785 transitions. [2021-11-19 05:26:03,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:26:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 3785 transitions. [2021-11-19 05:26:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 05:26:03,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:26:03,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:26:03,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:26:03,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:26:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:26:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1578541691, now seen corresponding path program 1 times [2021-11-19 05:26:03,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:26:03,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363077104] [2021-11-19 05:26:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:26:03,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:26:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:26:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:26:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:26:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 05:26:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:26:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:26:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 05:26:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:26:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:26:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:26:04,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:26:04,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363077104] [2021-11-19 05:26:04,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363077104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:26:04,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:26:04,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:26:04,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582571637] [2021-11-19 05:26:04,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:26:04,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:26:04,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:26:04,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:26:04,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:26:04,270 INFO L87 Difference]: Start difference. First operand 2979 states and 3785 transitions. Second operand has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:26:06,302 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:07,923 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:10,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:11,638 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:13,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:15,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:17,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:41,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:42,483 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:44,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:46,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:49,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:51,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:53,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:55,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:57,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:26:59,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:01,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:01,685 INFO L93 Difference]: Finished difference Result 7690 states and 10507 transitions. [2021-11-19 05:27:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:27:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 209 [2021-11-19 05:27:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:01,732 INFO L225 Difference]: With dead ends: 7690 [2021-11-19 05:27:01,732 INFO L226 Difference]: Without dead ends: 4716 [2021-11-19 05:27:01,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:27:01,757 INFO L933 BasicCegarLoop]: 3231 mSDtfsCounter, 9732 mSDsluCounter, 6568 mSDsCounter, 0 mSdLazyCounter, 8083 mSolverCounterSat, 3526 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9881 SdHoareTripleChecker+Valid, 9799 SdHoareTripleChecker+Invalid, 11622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3526 IncrementalHoareTripleChecker+Valid, 8083 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:01,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9881 Valid, 9799 Invalid, 11622 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3526 Valid, 8083 Invalid, 13 Unknown, 0 Unchecked, 56.5s Time] [2021-11-19 05:27:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4716 states. [2021-11-19 05:27:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4716 to 3353. [2021-11-19 05:27:01,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 2754 states have (on average 1.2058823529411764) internal successors, (3321), 2793 states have internal predecessors, (3321), 500 states have call successors, (500), 98 states have call predecessors, (500), 98 states have return successors, (499), 481 states have call predecessors, (499), 499 states have call successors, (499) [2021-11-19 05:27:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 4320 transitions. [2021-11-19 05:27:02,019 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 4320 transitions. Word has length 209 [2021-11-19 05:27:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:02,022 INFO L470 AbstractCegarLoop]: Abstraction has 3353 states and 4320 transitions. [2021-11-19 05:27:02,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:27:02,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 4320 transitions. [2021-11-19 05:27:02,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-19 05:27:02,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:02,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:02,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:27:02,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:02,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1060871128, now seen corresponding path program 1 times [2021-11-19 05:27:02,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:02,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888937334] [2021-11-19 05:27:02,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:02,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:02,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:27:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:02,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:03,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:27:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:03,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-11-19 05:27:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:03,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:27:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:03,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 05:27:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:03,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-11-19 05:27:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:27:03,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:03,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888937334] [2021-11-19 05:27:03,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888937334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:03,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:03,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 05:27:03,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831798386] [2021-11-19 05:27:03,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:03,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:27:03,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:03,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:27:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:27:03,345 INFO L87 Difference]: Start difference. First operand 3353 states and 4320 transitions. Second operand has 12 states, 11 states have (on average 16.545454545454547) internal successors, (182), 9 states have internal predecessors, (182), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 05:27:05,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:07,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:08,679 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:10,876 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:13,138 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:42,803 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:44,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:47,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:49,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:51,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:53,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:55,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:27:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:55,501 INFO L93 Difference]: Finished difference Result 9870 states and 13763 transitions. [2021-11-19 05:27:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 05:27:55,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 16.545454545454547) internal successors, (182), 9 states have internal predecessors, (182), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 205 [2021-11-19 05:27:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:55,557 INFO L225 Difference]: With dead ends: 9870 [2021-11-19 05:27:55,557 INFO L226 Difference]: Without dead ends: 6522 [2021-11-19 05:27:55,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:27:55,576 INFO L933 BasicCegarLoop]: 3602 mSDtfsCounter, 8781 mSDsluCounter, 12228 mSDsCounter, 0 mSdLazyCounter, 9718 mSolverCounterSat, 4010 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8920 SdHoareTripleChecker+Valid, 15830 SdHoareTripleChecker+Invalid, 13738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4010 IncrementalHoareTripleChecker+Valid, 9718 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:55,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8920 Valid, 15830 Invalid, 13738 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4010 Valid, 9718 Invalid, 10 Unknown, 0 Unchecked, 50.9s Time] [2021-11-19 05:27:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-11-19 05:27:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 4319. [2021-11-19 05:27:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4319 states, 3451 states have (on average 1.2407997681831353) internal successors, (4282), 3507 states have internal predecessors, (4282), 720 states have call successors, (720), 146 states have call predecessors, (720), 147 states have return successors, (720), 695 states have call predecessors, (720), 719 states have call successors, (720) [2021-11-19 05:27:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4319 states to 4319 states and 5722 transitions. [2021-11-19 05:27:55,952 INFO L78 Accepts]: Start accepts. Automaton has 4319 states and 5722 transitions. Word has length 205 [2021-11-19 05:27:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:55,953 INFO L470 AbstractCegarLoop]: Abstraction has 4319 states and 5722 transitions. [2021-11-19 05:27:55,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 16.545454545454547) internal successors, (182), 9 states have internal predecessors, (182), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 05:27:55,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4319 states and 5722 transitions. [2021-11-19 05:27:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-19 05:27:55,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:55,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:55,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:27:55,962 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:27:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1896634989, now seen corresponding path program 1 times [2021-11-19 05:27:55,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:55,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077470169] [2021-11-19 05:27:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:55,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:27:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:27:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:27:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:27:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:27:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-19 05:27:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 05:27:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 05:27:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:27:56,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:56,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077470169] [2021-11-19 05:27:56,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077470169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:27:56,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120533828] [2021-11-19 05:27:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:56,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:27:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:56,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:27:56,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:27:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:57,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:27:57,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:27:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:27:58,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:27:58,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120533828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:58,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:27:58,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2021-11-19 05:27:58,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839722236] [2021-11-19 05:27:58,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:58,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:27:58,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:58,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:27:58,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:27:58,292 INFO L87 Difference]: Start difference. First operand 4319 states and 5722 transitions. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:28:00,318 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:02,436 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:07,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:07,587 INFO L93 Difference]: Finished difference Result 8870 states and 11733 transitions. [2021-11-19 05:28:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:28:07,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 208 [2021-11-19 05:28:07,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:07,626 INFO L225 Difference]: With dead ends: 8870 [2021-11-19 05:28:07,626 INFO L226 Difference]: Without dead ends: 4442 [2021-11-19 05:28:07,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:28:07,715 INFO L933 BasicCegarLoop]: 3602 mSDtfsCounter, 1466 mSDsluCounter, 8426 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 12028 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:07,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 12028 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1598 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2021-11-19 05:28:07,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2021-11-19 05:28:07,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 4306. [2021-11-19 05:28:07,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 3443 states have (on average 1.2396166134185302) internal successors, (4268), 3499 states have internal predecessors, (4268), 715 states have call successors, (715), 146 states have call predecessors, (715), 147 states have return successors, (715), 690 states have call predecessors, (715), 714 states have call successors, (715) [2021-11-19 05:28:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5698 transitions. [2021-11-19 05:28:08,017 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5698 transitions. Word has length 208 [2021-11-19 05:28:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:08,018 INFO L470 AbstractCegarLoop]: Abstraction has 4306 states and 5698 transitions. [2021-11-19 05:28:08,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:28:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5698 transitions. [2021-11-19 05:28:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-19 05:28:08,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:08,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:08,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:08,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:08,249 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:08,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1307616805, now seen corresponding path program 1 times [2021-11-19 05:28:08,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:08,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660088136] [2021-11-19 05:28:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:08,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:28:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:28:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 05:28:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-19 05:28:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-19 05:28:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-19 05:28:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:28:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:28:08,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:08,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660088136] [2021-11-19 05:28:08,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660088136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:08,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018523732] [2021-11-19 05:28:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:08,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:08,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:08,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:08,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:28:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:09,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:28:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:10,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:28:10,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:10,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018523732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:10,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:10,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2021-11-19 05:28:10,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205416326] [2021-11-19 05:28:10,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:10,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:28:10,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:28:10,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:28:10,467 INFO L87 Difference]: Start difference. First operand 4306 states and 5698 transitions. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:28:11,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:14,112 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:16,260 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:20,631 INFO L93 Difference]: Finished difference Result 8801 states and 11628 transitions. [2021-11-19 05:28:20,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:28:20,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 209 [2021-11-19 05:28:20,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:20,672 INFO L225 Difference]: With dead ends: 8801 [2021-11-19 05:28:20,672 INFO L226 Difference]: Without dead ends: 4434 [2021-11-19 05:28:20,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:28:20,698 INFO L933 BasicCegarLoop]: 3588 mSDtfsCounter, 1206 mSDsluCounter, 8738 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 12326 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:20,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 12326 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1231 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2021-11-19 05:28:20,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2021-11-19 05:28:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 4296. [2021-11-19 05:28:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 3437 states have (on average 1.238580157113762) internal successors, (4257), 3493 states have internal predecessors, (4257), 711 states have call successors, (711), 146 states have call predecessors, (711), 147 states have return successors, (711), 686 states have call predecessors, (711), 710 states have call successors, (711) [2021-11-19 05:28:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 5679 transitions. [2021-11-19 05:28:21,036 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 5679 transitions. Word has length 209 [2021-11-19 05:28:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:21,037 INFO L470 AbstractCegarLoop]: Abstraction has 4296 states and 5679 transitions. [2021-11-19 05:28:21,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:28:21,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 5679 transitions. [2021-11-19 05:28:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-19 05:28:21,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:21,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:21,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:21,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 05:28:21,269 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:21,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:21,270 INFO L85 PathProgramCache]: Analyzing trace with hash -967191227, now seen corresponding path program 1 times [2021-11-19 05:28:21,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:21,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713370541] [2021-11-19 05:28:21,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:21,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:28:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:28:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:28:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 05:28:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 05:28:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 05:28:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 05:28:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:28:21,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:21,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713370541] [2021-11-19 05:28:21,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713370541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:21,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502470323] [2021-11-19 05:28:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:21,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:21,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:22,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:28:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:28:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:28:23,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:23,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502470323] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:23,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:23,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2021-11-19 05:28:23,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594812493] [2021-11-19 05:28:23,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:23,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:28:23,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:28:23,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:28:23,486 INFO L87 Difference]: Start difference. First operand 4296 states and 5679 transitions. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:28:24,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:25,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:27,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:32,623 INFO L93 Difference]: Finished difference Result 8796 states and 11528 transitions. [2021-11-19 05:28:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:28:32,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 210 [2021-11-19 05:28:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:32,652 INFO L225 Difference]: With dead ends: 8796 [2021-11-19 05:28:32,652 INFO L226 Difference]: Without dead ends: 4505 [2021-11-19 05:28:32,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:28:32,667 INFO L933 BasicCegarLoop]: 3969 mSDtfsCounter, 1719 mSDsluCounter, 9274 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 13243 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:32,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1720 Valid, 13243 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1623 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2021-11-19 05:28:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2021-11-19 05:28:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4176. [2021-11-19 05:28:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 3357 states have (on average 1.2347333929103366) internal successors, (4145), 3413 states have internal predecessors, (4145), 676 states have call successors, (676), 141 states have call predecessors, (676), 142 states have return successors, (676), 651 states have call predecessors, (676), 675 states have call successors, (676) [2021-11-19 05:28:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 5497 transitions. [2021-11-19 05:28:32,933 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 5497 transitions. Word has length 210 [2021-11-19 05:28:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:32,934 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 5497 transitions. [2021-11-19 05:28:32,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:28:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 5497 transitions. [2021-11-19 05:28:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-19 05:28:32,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:32,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:32,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:33,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 05:28:33,173 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash -64365446, now seen corresponding path program 1 times [2021-11-19 05:28:33,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:33,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397303473] [2021-11-19 05:28:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:33,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:28:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:33,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:28:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:28:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 05:28:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 05:28:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-19 05:28:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 05:28:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:28:33,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:33,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397303473] [2021-11-19 05:28:33,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397303473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:28:33,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435286] [2021-11-19 05:28:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:33,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:33,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:28:33,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:28:33,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:28:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:28:34,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:28:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:28:35,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:28:35,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:35,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:28:35,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2021-11-19 05:28:35,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172364302] [2021-11-19 05:28:35,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:35,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:28:35,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:28:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:28:35,346 INFO L87 Difference]: Start difference. First operand 4176 states and 5497 transitions. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:28:37,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:39,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:28:43,084 INFO L93 Difference]: Finished difference Result 8349 states and 11000 transitions. [2021-11-19 05:28:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:28:43,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 210 [2021-11-19 05:28:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:28:43,108 INFO L225 Difference]: With dead ends: 8349 [2021-11-19 05:28:43,108 INFO L226 Difference]: Without dead ends: 4178 [2021-11-19 05:28:43,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:28:43,127 INFO L933 BasicCegarLoop]: 3041 mSDtfsCounter, 1037 mSDsluCounter, 7829 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 10870 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:28:43,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1039 Valid, 10870 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1115 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2021-11-19 05:28:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-11-19 05:28:43,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 4176. [2021-11-19 05:28:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4176 states, 3357 states have (on average 1.2344355078939528) internal successors, (4144), 3413 states have internal predecessors, (4144), 676 states have call successors, (676), 141 states have call predecessors, (676), 142 states have return successors, (676), 651 states have call predecessors, (676), 675 states have call successors, (676) [2021-11-19 05:28:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4176 states to 4176 states and 5496 transitions. [2021-11-19 05:28:43,388 INFO L78 Accepts]: Start accepts. Automaton has 4176 states and 5496 transitions. Word has length 210 [2021-11-19 05:28:43,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:28:43,389 INFO L470 AbstractCegarLoop]: Abstraction has 4176 states and 5496 transitions. [2021-11-19 05:28:43,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:28:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4176 states and 5496 transitions. [2021-11-19 05:28:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-19 05:28:43,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:28:43,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:28:43,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:28:43,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:28:43,617 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:28:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:28:43,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1816324685, now seen corresponding path program 1 times [2021-11-19 05:28:43,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:28:43,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777538262] [2021-11-19 05:28:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:28:43,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:28:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:28:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:28:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:28:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:28:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:28:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:28:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 05:28:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 05:28:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:28:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:28:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:28:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 05:28:44,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:28:44,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777538262] [2021-11-19 05:28:44,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777538262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:28:44,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:28:44,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:28:44,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059197671] [2021-11-19 05:28:44,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:28:44,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:28:44,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:28:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:28:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:28:44,304 INFO L87 Difference]: Start difference. First operand 4176 states and 5496 transitions. Second operand has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 6 states have internal predecessors, (185), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 05:28:46,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:48,486 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:51,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:53,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:28:55,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:29:19,516 INFO L93 Difference]: Finished difference Result 9329 states and 12934 transitions. [2021-11-19 05:29:19,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:29:19,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 6 states have internal predecessors, (185), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 220 [2021-11-19 05:29:19,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:29:19,545 INFO L225 Difference]: With dead ends: 9329 [2021-11-19 05:29:19,545 INFO L226 Difference]: Without dead ends: 5158 [2021-11-19 05:29:19,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:29:19,565 INFO L933 BasicCegarLoop]: 3163 mSDtfsCounter, 11689 mSDsluCounter, 4314 mSDsCounter, 0 mSdLazyCounter, 4881 mSolverCounterSat, 5369 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11851 SdHoareTripleChecker+Valid, 7477 SdHoareTripleChecker+Invalid, 10253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5369 IncrementalHoareTripleChecker+Valid, 4881 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:29:19,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11851 Valid, 7477 Invalid, 10253 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5369 Valid, 4881 Invalid, 3 Unknown, 0 Unchecked, 34.3s Time] [2021-11-19 05:29:19,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-11-19 05:29:19,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 3694. [2021-11-19 05:29:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3694 states, 3010 states have (on average 1.217607973421927) internal successors, (3665), 3055 states have internal predecessors, (3665), 565 states have call successors, (565), 118 states have call predecessors, (565), 118 states have return successors, (564), 544 states have call predecessors, (564), 564 states have call successors, (564) [2021-11-19 05:29:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3694 states to 3694 states and 4794 transitions. [2021-11-19 05:29:19,809 INFO L78 Accepts]: Start accepts. Automaton has 3694 states and 4794 transitions. Word has length 220 [2021-11-19 05:29:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:29:19,809 INFO L470 AbstractCegarLoop]: Abstraction has 3694 states and 4794 transitions. [2021-11-19 05:29:19,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.555555555555557) internal successors, (185), 6 states have internal predecessors, (185), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 05:29:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3694 states and 4794 transitions. [2021-11-19 05:29:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-19 05:29:19,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:29:19,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:29:19,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 05:29:19,816 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:29:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:29:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -641114456, now seen corresponding path program 1 times [2021-11-19 05:29:19,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:29:19,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575656055] [2021-11-19 05:29:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:29:19,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:29:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:29:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:29:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:29:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:29:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:29:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:29:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 05:29:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-19 05:29:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:29:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:29:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:29:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 05:29:20,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:29:20,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575656055] [2021-11-19 05:29:20,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575656055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:29:20,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:29:20,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:29:20,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568172215] [2021-11-19 05:29:20,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:29:20,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:29:20,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:29:20,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:29:20,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:29:20,468 INFO L87 Difference]: Start difference. First operand 3694 states and 4794 transitions. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 6 states have internal predecessors, (188), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 05:29:22,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:24,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:26,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:28,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:29,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:31,065 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:33,467 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:29:35,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:09,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:11,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:13,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:16,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:18,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:20,303 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:22,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:22,525 INFO L93 Difference]: Finished difference Result 8847 states and 12232 transitions. [2021-11-19 05:30:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:30:22,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 6 states have internal predecessors, (188), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 220 [2021-11-19 05:30:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:22,563 INFO L225 Difference]: With dead ends: 8847 [2021-11-19 05:30:22,563 INFO L226 Difference]: Without dead ends: 5158 [2021-11-19 05:30:22,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:30:22,585 INFO L933 BasicCegarLoop]: 3125 mSDtfsCounter, 7874 mSDsluCounter, 5662 mSDsCounter, 0 mSdLazyCounter, 6663 mSolverCounterSat, 3142 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8032 SdHoareTripleChecker+Valid, 8787 SdHoareTripleChecker+Invalid, 9817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3142 IncrementalHoareTripleChecker+Valid, 6663 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:22,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8032 Valid, 8787 Invalid, 9817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3142 Valid, 6663 Invalid, 12 Unknown, 0 Unchecked, 61.0s Time] [2021-11-19 05:30:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-11-19 05:30:22,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 3694. [2021-11-19 05:30:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3694 states, 3010 states have (on average 1.2172757475083056) internal successors, (3664), 3055 states have internal predecessors, (3664), 565 states have call successors, (565), 118 states have call predecessors, (565), 118 states have return successors, (564), 544 states have call predecessors, (564), 564 states have call successors, (564) [2021-11-19 05:30:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3694 states to 3694 states and 4793 transitions. [2021-11-19 05:30:22,939 INFO L78 Accepts]: Start accepts. Automaton has 3694 states and 4793 transitions. Word has length 220 [2021-11-19 05:30:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:22,940 INFO L470 AbstractCegarLoop]: Abstraction has 3694 states and 4793 transitions. [2021-11-19 05:30:22,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 6 states have internal predecessors, (188), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-19 05:30:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3694 states and 4793 transitions. [2021-11-19 05:30:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-19 05:30:22,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:22,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:30:22,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 05:30:22,948 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1724209539, now seen corresponding path program 1 times [2021-11-19 05:30:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:30:22,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244846511] [2021-11-19 05:30:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:22,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:30:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:30:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:30:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:30:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:30:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:30:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:30:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 05:30:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-19 05:30:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-11-19 05:30:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:30:23,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:30:23,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244846511] [2021-11-19 05:30:23,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244846511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:23,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284703918] [2021-11-19 05:30:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:23,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:30:23,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:30:23,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:30:23,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:30:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:24,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:30:24,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:30:25,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:30:25,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284703918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:30:25,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:30:25,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-19 05:30:25,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91516318] [2021-11-19 05:30:25,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:25,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:30:25,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:30:25,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:30:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:30:25,324 INFO L87 Difference]: Start difference. First operand 3694 states and 4793 transitions. Second operand has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 05:30:27,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:28,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:33,258 INFO L93 Difference]: Finished difference Result 7517 states and 9739 transitions. [2021-11-19 05:30:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:30:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 223 [2021-11-19 05:30:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:33,280 INFO L225 Difference]: With dead ends: 7517 [2021-11-19 05:30:33,280 INFO L226 Difference]: Without dead ends: 3828 [2021-11-19 05:30:33,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:30:33,302 INFO L933 BasicCegarLoop]: 3145 mSDtfsCounter, 2405 mSDsluCounter, 5768 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2406 SdHoareTripleChecker+Valid, 8913 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:33,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2406 Valid, 8913 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1595 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-19 05:30:33,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2021-11-19 05:30:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 3692. [2021-11-19 05:30:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3692 states, 3009 states have (on average 1.217015619807245) internal successors, (3662), 3054 states have internal predecessors, (3662), 564 states have call successors, (564), 118 states have call predecessors, (564), 118 states have return successors, (563), 543 states have call predecessors, (563), 563 states have call successors, (563) [2021-11-19 05:30:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3692 states to 3692 states and 4789 transitions. [2021-11-19 05:30:33,633 INFO L78 Accepts]: Start accepts. Automaton has 3692 states and 4789 transitions. Word has length 223 [2021-11-19 05:30:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:33,634 INFO L470 AbstractCegarLoop]: Abstraction has 3692 states and 4789 transitions. [2021-11-19 05:30:33,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 05:30:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3692 states and 4789 transitions. [2021-11-19 05:30:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-19 05:30:33,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:33,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:30:33,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:33,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 05:30:33,860 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1684959842, now seen corresponding path program 1 times [2021-11-19 05:30:33,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:30:33,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568851266] [2021-11-19 05:30:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:33,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:30:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:30:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:30:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:30:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:30:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:30:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:30:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 05:30:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-19 05:30:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-19 05:30:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:30:34,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:30:34,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568851266] [2021-11-19 05:30:34,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568851266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:34,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835549720] [2021-11-19 05:30:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:34,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:30:34,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:30:34,678 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:30:34,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:30:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:35,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1883 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:30:35,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:30:36,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:30:36,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835549720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:30:36,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:30:36,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-19 05:30:36,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295848617] [2021-11-19 05:30:36,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:36,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:30:36,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:30:36,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:30:36,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:30:36,228 INFO L87 Difference]: Start difference. First operand 3692 states and 4789 transitions. Second operand has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 05:30:38,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:41,886 INFO L93 Difference]: Finished difference Result 7514 states and 9732 transitions. [2021-11-19 05:30:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:30:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 224 [2021-11-19 05:30:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:41,906 INFO L225 Difference]: With dead ends: 7514 [2021-11-19 05:30:41,906 INFO L226 Difference]: Without dead ends: 3827 [2021-11-19 05:30:41,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:30:41,927 INFO L933 BasicCegarLoop]: 3010 mSDtfsCounter, 2526 mSDsluCounter, 4083 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2527 SdHoareTripleChecker+Valid, 7093 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:41,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2527 Valid, 7093 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-19 05:30:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-11-19 05:30:42,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3688. [2021-11-19 05:30:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3007 states have (on average 1.2164948453608246) internal successors, (3658), 3052 states have internal predecessors, (3658), 562 states have call successors, (562), 118 states have call predecessors, (562), 118 states have return successors, (561), 541 states have call predecessors, (561), 561 states have call successors, (561) [2021-11-19 05:30:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 4781 transitions. [2021-11-19 05:30:42,184 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 4781 transitions. Word has length 224 [2021-11-19 05:30:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:42,184 INFO L470 AbstractCegarLoop]: Abstraction has 3688 states and 4781 transitions. [2021-11-19 05:30:42,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 05:30:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 4781 transitions. [2021-11-19 05:30:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-19 05:30:42,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:42,192 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:30:42,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:42,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 05:30:42,409 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1335453189, now seen corresponding path program 1 times [2021-11-19 05:30:42,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:30:42,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271595259] [2021-11-19 05:30:42,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:42,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:30:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:42,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:30:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:42,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:30:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:42,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:30:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:30:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:30:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 05:30:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 05:30:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-19 05:30:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:30:43,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:30:43,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271595259] [2021-11-19 05:30:43,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271595259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:30:43,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457706349] [2021-11-19 05:30:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:43,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:30:43,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:30:43,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:30:43,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:30:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:43,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:30:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:30:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 05:30:44,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:30:44,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457706349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:30:44,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:30:44,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-11-19 05:30:44,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974869470] [2021-11-19 05:30:44,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:44,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:30:44,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:30:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:30:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:30:44,639 INFO L87 Difference]: Start difference. First operand 3688 states and 4781 transitions. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 05:30:46,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:30:54,395 INFO L93 Difference]: Finished difference Result 7371 states and 9565 transitions. [2021-11-19 05:30:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:30:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 225 [2021-11-19 05:30:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:30:54,421 INFO L225 Difference]: With dead ends: 7371 [2021-11-19 05:30:54,421 INFO L226 Difference]: Without dead ends: 3688 [2021-11-19 05:30:54,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:30:54,442 INFO L933 BasicCegarLoop]: 3137 mSDtfsCounter, 2542 mSDsluCounter, 4739 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2543 SdHoareTripleChecker+Valid, 7876 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:30:54,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2543 Valid, 7876 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1153 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-19 05:30:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3688 states. [2021-11-19 05:30:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3688 to 3686. [2021-11-19 05:30:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3006 states have (on average 1.2162341982701264) internal successors, (3656), 3051 states have internal predecessors, (3656), 561 states have call successors, (561), 118 states have call predecessors, (561), 118 states have return successors, (560), 540 states have call predecessors, (560), 560 states have call successors, (560) [2021-11-19 05:30:54,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 4777 transitions. [2021-11-19 05:30:54,698 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 4777 transitions. Word has length 225 [2021-11-19 05:30:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:30:54,699 INFO L470 AbstractCegarLoop]: Abstraction has 3686 states and 4777 transitions. [2021-11-19 05:30:54,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 05:30:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 4777 transitions. [2021-11-19 05:30:54,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-19 05:30:54,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:30:54,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:30:54,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:30:54,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b55161d-79a2-42ed-97e1-ce84adaacad7/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:30:54,921 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:30:54,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:30:54,922 INFO L85 PathProgramCache]: Analyzing trace with hash 187825947, now seen corresponding path program 1 times [2021-11-19 05:30:54,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:30:54,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855357627] [2021-11-19 05:30:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:30:54,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:30:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:30:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:30:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:30:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:30:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:30:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:30:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:30:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 05:30:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 05:30:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-19 05:30:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:30:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:30:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 05:30:55,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:30:55,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855357627] [2021-11-19 05:30:55,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855357627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:30:55,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:30:55,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:30:55,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629968985] [2021-11-19 05:30:55,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:30:55,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:30:55,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:30:55,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:30:55,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:30:55,765 INFO L87 Difference]: Start difference. First operand 3686 states and 4777 transitions. Second operand has 9 states, 9 states have (on average 21.0) internal successors, (189), 6 states have internal predecessors, (189), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-19 05:30:57,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:30:59,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:01,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:03,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:05,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:08,675 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:10,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:13,656 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:16,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:31:18,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:07,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:09,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:11,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:13,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:15,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:17,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:19,999 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:22,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:24,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:26,287 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:28,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:30,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:32,608 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:34,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:34,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:32:34,824 INFO L93 Difference]: Finished difference Result 8811 states and 12165 transitions. [2021-11-19 05:32:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:32:34,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.0) internal successors, (189), 6 states have internal predecessors, (189), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 225 [2021-11-19 05:32:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:32:34,857 INFO L225 Difference]: With dead ends: 8811 [2021-11-19 05:32:34,857 INFO L226 Difference]: Without dead ends: 5130 [2021-11-19 05:32:34,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:32:34,878 INFO L933 BasicCegarLoop]: 3220 mSDtfsCounter, 6036 mSDsluCounter, 8360 mSDsCounter, 0 mSdLazyCounter, 10668 mSolverCounterSat, 1885 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6204 SdHoareTripleChecker+Valid, 11580 SdHoareTripleChecker+Invalid, 12574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1885 IncrementalHoareTripleChecker+Valid, 10668 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:32:34,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6204 Valid, 11580 Invalid, 12574 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1885 Valid, 10668 Invalid, 21 Unknown, 0 Unchecked, 97.6s Time] [2021-11-19 05:32:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2021-11-19 05:32:35,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 3682. [2021-11-19 05:32:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3004 states have (on average 1.2157123834886818) internal successors, (3652), 3049 states have internal predecessors, (3652), 559 states have call successors, (559), 118 states have call predecessors, (559), 118 states have return successors, (558), 538 states have call predecessors, (558), 558 states have call successors, (558) [2021-11-19 05:32:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4769 transitions. [2021-11-19 05:32:35,262 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4769 transitions. Word has length 225 [2021-11-19 05:32:35,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:32:35,263 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4769 transitions. [2021-11-19 05:32:35,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.0) internal successors, (189), 6 states have internal predecessors, (189), 4 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-19 05:32:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4769 transitions. [2021-11-19 05:32:35,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-19 05:32:35,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:32:35,269 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:32:35,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 05:32:35,270 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:32:35,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:32:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash 104617357, now seen corresponding path program 1 times [2021-11-19 05:32:35,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:32:35,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209747062] [2021-11-19 05:32:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:35,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:32:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:35,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:32:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:35,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:32:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:35,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:32:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:35,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:32:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:35,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:32:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:35,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:32:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:35,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:32:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:35,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 05:32:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:36,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 05:32:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:36,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-19 05:32:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:36,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:32:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 05:32:36,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:32:36,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209747062] [2021-11-19 05:32:36,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209747062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:32:36,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:32:36,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:32:36,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452091008] [2021-11-19 05:32:36,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:32:36,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:32:36,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:32:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:32:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:32:36,097 INFO L87 Difference]: Start difference. First operand 3682 states and 4769 transitions. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 6 states have internal predecessors, (187), 3 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 05:32:38,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:40,316 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:42,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:32:44,453 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:24,302 INFO L93 Difference]: Finished difference Result 8806 states and 12151 transitions. [2021-11-19 05:33:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:33:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 6 states have internal predecessors, (187), 3 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 225 [2021-11-19 05:33:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:24,334 INFO L225 Difference]: With dead ends: 8806 [2021-11-19 05:33:24,335 INFO L226 Difference]: Without dead ends: 5129 [2021-11-19 05:33:24,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:33:24,354 INFO L933 BasicCegarLoop]: 3123 mSDtfsCounter, 7272 mSDsluCounter, 6628 mSDsCounter, 0 mSdLazyCounter, 6760 mSolverCounterSat, 3367 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7422 SdHoareTripleChecker+Valid, 9751 SdHoareTripleChecker+Invalid, 10130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3367 IncrementalHoareTripleChecker+Valid, 6760 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:24,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7422 Valid, 9751 Invalid, 10130 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3367 Valid, 6760 Invalid, 3 Unknown, 0 Unchecked, 47.0s Time] [2021-11-19 05:33:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5129 states. [2021-11-19 05:33:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5129 to 3682. [2021-11-19 05:33:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3004 states have (on average 1.2153794940079894) internal successors, (3651), 3049 states have internal predecessors, (3651), 559 states have call successors, (559), 118 states have call predecessors, (559), 118 states have return successors, (558), 538 states have call predecessors, (558), 558 states have call successors, (558) [2021-11-19 05:33:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4768 transitions. [2021-11-19 05:33:24,691 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4768 transitions. Word has length 225 [2021-11-19 05:33:24,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:24,692 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4768 transitions. [2021-11-19 05:33:24,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 6 states have internal predecessors, (187), 3 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 05:33:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4768 transitions. [2021-11-19 05:33:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-19 05:33:24,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:24,700 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:24,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 05:33:24,700 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash -703290854, now seen corresponding path program 1 times [2021-11-19 05:33:24,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:24,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121467569] [2021-11-19 05:33:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:24,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:24,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:33:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:33:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:33:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:33:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:33:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:33:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:33:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 05:33:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:33:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-19 05:33:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-19 05:33:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:33:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 05:33:25,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:25,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121467569] [2021-11-19 05:33:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121467569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:25,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:25,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:33:25,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203594645] [2021-11-19 05:33:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:25,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:33:25,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:33:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:33:25,596 INFO L87 Difference]: Start difference. First operand 3682 states and 4768 transitions. Second operand has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 6 states have internal predecessors, (188), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 05:33:27,634 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:29,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:31,561 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:33,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:33:36,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:21,268 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:23,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:25,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:27,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:30,407 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:32,509 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:34,634 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:36,776 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:38,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:41,047 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:43,180 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:43,304 INFO L93 Difference]: Finished difference Result 8937 states and 12295 transitions. [2021-11-19 05:34:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:34:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 6 states have internal predecessors, (188), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 228 [2021-11-19 05:34:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:43,333 INFO L225 Difference]: With dead ends: 8937 [2021-11-19 05:34:43,333 INFO L226 Difference]: Without dead ends: 5260 [2021-11-19 05:34:43,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:34:43,352 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 9040 mSDsluCounter, 7287 mSDsCounter, 0 mSdLazyCounter, 7384 mSolverCounterSat, 3496 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9184 SdHoareTripleChecker+Valid, 10595 SdHoareTripleChecker+Invalid, 10894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3496 IncrementalHoareTripleChecker+Valid, 7384 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:43,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9184 Valid, 10595 Invalid, 10894 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3496 Valid, 7384 Invalid, 14 Unknown, 0 Unchecked, 76.3s Time] [2021-11-19 05:34:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-11-19 05:34:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 3680. [2021-11-19 05:34:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3003 states have (on average 1.2151182151182152) internal successors, (3649), 3048 states have internal predecessors, (3649), 558 states have call successors, (558), 118 states have call predecessors, (558), 118 states have return successors, (557), 537 states have call predecessors, (557), 557 states have call successors, (557) [2021-11-19 05:34:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 4764 transitions. [2021-11-19 05:34:43,679 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 4764 transitions. Word has length 228 [2021-11-19 05:34:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:43,680 INFO L470 AbstractCegarLoop]: Abstraction has 3680 states and 4764 transitions. [2021-11-19 05:34:43,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.88888888888889) internal successors, (188), 6 states have internal predecessors, (188), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 05:34:43,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 4764 transitions. [2021-11-19 05:34:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-19 05:34:43,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:43,687 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:43,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 05:34:43,687 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1683900857, now seen corresponding path program 1 times [2021-11-19 05:34:43,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:43,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282424208] [2021-11-19 05:34:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:43,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:34:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:34:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:34:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 05:34:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:34:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-11-19 05:34:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-19 05:34:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:34:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 05:34:44,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:44,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282424208] [2021-11-19 05:34:44,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282424208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:44,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:34:44,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:34:44,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433160411] [2021-11-19 05:34:44,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:44,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:34:44,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:34:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:34:44,621 INFO L87 Difference]: Start difference. First operand 3680 states and 4764 transitions. Second operand has 9 states, 9 states have (on average 21.0) internal successors, (189), 6 states have internal predecessors, (189), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 05:34:46,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:48,230 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:50,428 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:52,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:54,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:57,351 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:59,979 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:35:59,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:01,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:03,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:05,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:07,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:09,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:12,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:14,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:16,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:16,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:16,442 INFO L93 Difference]: Finished difference Result 8932 states and 12285 transitions. [2021-11-19 05:36:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:36:16,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.0) internal successors, (189), 6 states have internal predecessors, (189), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 229 [2021-11-19 05:36:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:16,467 INFO L225 Difference]: With dead ends: 8932 [2021-11-19 05:36:16,468 INFO L226 Difference]: Without dead ends: 5257 [2021-11-19 05:36:16,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:36:16,481 INFO L933 BasicCegarLoop]: 3086 mSDtfsCounter, 5630 mSDsluCounter, 8613 mSDsCounter, 0 mSdLazyCounter, 10024 mSolverCounterSat, 1779 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5790 SdHoareTripleChecker+Valid, 11699 SdHoareTripleChecker+Invalid, 11816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1779 IncrementalHoareTripleChecker+Valid, 10024 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:16,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5790 Valid, 11699 Invalid, 11816 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1779 Valid, 10024 Invalid, 13 Unknown, 0 Unchecked, 90.2s Time] [2021-11-19 05:36:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5257 states. [2021-11-19 05:36:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5257 to 3676. [2021-11-19 05:36:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3001 states have (on average 1.214595134955015) internal successors, (3645), 3046 states have internal predecessors, (3645), 556 states have call successors, (556), 118 states have call predecessors, (556), 118 states have return successors, (555), 535 states have call predecessors, (555), 555 states have call successors, (555) [2021-11-19 05:36:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 4756 transitions. [2021-11-19 05:36:16,835 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 4756 transitions. Word has length 229 [2021-11-19 05:36:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:16,836 INFO L470 AbstractCegarLoop]: Abstraction has 3676 states and 4756 transitions. [2021-11-19 05:36:16,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.0) internal successors, (189), 6 states have internal predecessors, (189), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 05:36:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 4756 transitions. [2021-11-19 05:36:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-19 05:36:16,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:16,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:16,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 05:36:16,843 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1106225570, now seen corresponding path program 1 times [2021-11-19 05:36:16,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:16,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217355356] [2021-11-19 05:36:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:16,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:36:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:36:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:36:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:36:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:36:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:36:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 05:36:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-19 05:36:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:36:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 05:36:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:36:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 05:36:17,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:17,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217355356] [2021-11-19 05:36:17,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217355356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:17,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:36:17,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:36:17,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135786854] [2021-11-19 05:36:17,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:17,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:36:17,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:36:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:36:17,829 INFO L87 Difference]: Start difference. First operand 3676 states and 4756 transitions. Second operand has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 05:36:19,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:21,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:23,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:24,213 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:26,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:28,904 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:37:23,665 INFO L93 Difference]: Finished difference Result 8779 states and 12101 transitions. [2021-11-19 05:37:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:37:23,672 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 230 [2021-11-19 05:37:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:37:23,691 INFO L225 Difference]: With dead ends: 8779 [2021-11-19 05:37:23,692 INFO L226 Difference]: Without dead ends: 5108 [2021-11-19 05:37:23,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:37:23,706 INFO L933 BasicCegarLoop]: 3234 mSDtfsCounter, 9099 mSDsluCounter, 4859 mSDsCounter, 0 mSdLazyCounter, 5754 mSolverCounterSat, 4116 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9259 SdHoareTripleChecker+Valid, 8093 SdHoareTripleChecker+Invalid, 9873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4116 IncrementalHoareTripleChecker+Valid, 5754 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:37:23,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9259 Valid, 8093 Invalid, 9873 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4116 Valid, 5754 Invalid, 3 Unknown, 0 Unchecked, 64.1s Time] [2021-11-19 05:37:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2021-11-19 05:37:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 3672. [2021-11-19 05:37:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 2999 states have (on average 1.2140713571190396) internal successors, (3641), 3044 states have internal predecessors, (3641), 554 states have call successors, (554), 118 states have call predecessors, (554), 118 states have return successors, (553), 533 states have call predecessors, (553), 553 states have call successors, (553) [2021-11-19 05:37:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 4748 transitions. [2021-11-19 05:37:24,042 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 4748 transitions. Word has length 230 [2021-11-19 05:37:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:37:24,043 INFO L470 AbstractCegarLoop]: Abstraction has 3672 states and 4748 transitions. [2021-11-19 05:37:24,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 6 states have internal predecessors, (190), 4 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-19 05:37:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 4748 transitions. [2021-11-19 05:37:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-19 05:37:24,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:37:24,049 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:37:24,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 05:37:24,050 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:37:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:37:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash -313633408, now seen corresponding path program 1 times [2021-11-19 05:37:24,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:37:24,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314566993] [2021-11-19 05:37:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:24,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:37:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-19 05:37:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:37:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:37:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:37:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:37:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:37:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:37:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-19 05:37:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:37:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-19 05:37:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-19 05:37:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:37:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 05:37:24,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:37:24,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314566993] [2021-11-19 05:37:24,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314566993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:37:24,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:37:24,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 05:37:24,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290483998] [2021-11-19 05:37:24,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:37:24,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:37:24,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:37:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:37:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:37:24,935 INFO L87 Difference]: Start difference. First operand 3672 states and 4748 transitions. Second operand has 8 states, 8 states have (on average 23.5) internal successors, (188), 5 states have internal predecessors, (188), 3 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-19 05:37:26,966 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:28,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:29,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:31,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:33,786 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:34,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:37,517 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []