./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:04:32,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:04:32,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:04:32,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:04:32,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:04:32,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:04:32,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:04:32,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:04:32,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:04:32,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:04:32,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:04:32,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:04:32,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:04:32,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:04:32,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:04:32,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:04:32,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:04:32,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:04:32,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:04:32,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:04:32,523 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:04:32,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:04:32,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:04:32,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:04:32,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:04:32,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:04:32,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:04:32,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:04:32,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:04:32,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:04:32,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:04:32,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:04:32,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:04:32,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:04:32,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:04:32,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:04:32,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:04:32,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:04:32,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:04:32,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:04:32,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:04:32,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:04:32,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:04:32,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:04:32,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:04:32,577 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:04:32,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:04:32,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:04:32,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:04:32,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:04:32,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:04:32,579 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:04:32,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:04:32,580 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:04:32,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:04:32,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:04:32,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:04:32,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:04:32,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:04:32,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:04:32,582 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:04:32,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:04:32,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:04:32,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:04:32,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:04:32,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:04:32,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:04:32,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:04:32,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:04:32,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:04:32,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:04:32,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:04:32,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:04:32,585 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:04:32,585 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:04:32,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:04:32,585 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-07-22 11:04:32,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:04:32,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:04:32,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:04:32,822 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:04:32,823 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:04:32,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-07-22 11:04:32,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d41a5c911/9a0bcc426ee541a08bdb43364a99c2b8/FLAG63b186a7f [2022-07-22 11:04:33,312 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:04:33,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-07-22 11:04:33,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d41a5c911/9a0bcc426ee541a08bdb43364a99c2b8/FLAG63b186a7f [2022-07-22 11:04:33,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d41a5c911/9a0bcc426ee541a08bdb43364a99c2b8 [2022-07-22 11:04:33,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:04:33,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:04:33,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:04:33,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:04:33,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:04:33,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62652df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33, skipping insertion in model container [2022-07-22 11:04:33,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:04:33,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:04:33,511 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-07-22 11:04:33,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:04:33,564 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:04:33,575 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-07-22 11:04:33,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:04:33,614 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:04:33,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33 WrapperNode [2022-07-22 11:04:33,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:04:33,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:04:33,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:04:33,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:04:33,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,648 INFO L137 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-07-22 11:04:33,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:04:33,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:04:33,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:04:33,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:04:33,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:04:33,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:04:33,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:04:33,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:04:33,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (1/1) ... [2022-07-22 11:04:33,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:04:33,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:33,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 11:04:33,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 11:04:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:04:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:04:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 11:04:33,747 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 11:04:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:04:33,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:04:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-07-22 11:04:33,747 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-07-22 11:04:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 11:04:33,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 11:04:33,802 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:04:33,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:04:34,057 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:04:34,066 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:04:34,066 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 11:04:34,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:34 BoogieIcfgContainer [2022-07-22 11:04:34,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:04:34,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:04:34,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:04:34,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:04:34,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:04:33" (1/3) ... [2022-07-22 11:04:34,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ecff59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:04:34, skipping insertion in model container [2022-07-22 11:04:34,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:33" (2/3) ... [2022-07-22 11:04:34,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ecff59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:04:34, skipping insertion in model container [2022-07-22 11:04:34,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:34" (3/3) ... [2022-07-22 11:04:34,075 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-07-22 11:04:34,087 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:04:34,088 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:04:34,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:04:34,157 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@411d46cb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ec78fc5 [2022-07-22 11:04:34,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:04:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 76 states have internal predecessors, (127), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 11:04:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 11:04:34,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:34,176 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:34,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1197400178, now seen corresponding path program 1 times [2022-07-22 11:04:34,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:34,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638188266] [2022-07-22 11:04:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:34,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:34,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:34,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638188266] [2022-07-22 11:04:34,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638188266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:34,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:34,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 11:04:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850056163] [2022-07-22 11:04:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:34,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:04:34,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:04:34,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:04:34,506 INFO L87 Difference]: Start difference. First operand has 88 states, 75 states have (on average 1.6933333333333334) internal successors, (127), 76 states have internal predecessors, (127), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:34,591 INFO L93 Difference]: Finished difference Result 181 states and 304 transitions. [2022-07-22 11:04:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:04:34,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-07-22 11:04:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:34,602 INFO L225 Difference]: With dead ends: 181 [2022-07-22 11:04:34,602 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 11:04:34,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 11:04:34,612 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 91 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:34,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 11:04:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2022-07-22 11:04:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 73 states have internal predecessors, (105), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 11:04:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2022-07-22 11:04:34,652 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 37 [2022-07-22 11:04:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:34,652 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2022-07-22 11:04:34,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2022-07-22 11:04:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:34,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:34,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 11:04:34,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:04:34,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:34,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1825768574, now seen corresponding path program 1 times [2022-07-22 11:04:34,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005697937] [2022-07-22 11:04:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 11:04:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:34,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:34,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005697937] [2022-07-22 11:04:34,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005697937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049858211] [2022-07-22 11:04:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:34,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:34,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:34,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:34,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:04:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 11:04:35,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 11:04:35,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:35,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049858211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:35,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:35,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 24 [2022-07-22 11:04:35,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535484245] [2022-07-22 11:04:35,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:35,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 11:04:35,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:35,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 11:04:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:04:35,572 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand has 24 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 11:04:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:38,208 INFO L93 Difference]: Finished difference Result 419 states and 662 transitions. [2022-07-22 11:04:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 11:04:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 44 [2022-07-22 11:04:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:38,214 INFO L225 Difference]: With dead ends: 419 [2022-07-22 11:04:38,214 INFO L226 Difference]: Without dead ends: 338 [2022-07-22 11:04:38,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 11:04:38,218 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1123 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 3610 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 3745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 3610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:38,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 527 Invalid, 3745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 3610 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 11:04:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-22 11:04:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 116. [2022-07-22 11:04:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 99 states have internal predecessors, (133), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-22 11:04:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 167 transitions. [2022-07-22 11:04:38,258 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 167 transitions. Word has length 44 [2022-07-22 11:04:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:38,259 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 167 transitions. [2022-07-22 11:04:38,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 11:04:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 167 transitions. [2022-07-22 11:04:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 11:04:38,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:38,263 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:38,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:38,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:38,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash 48277341, now seen corresponding path program 1 times [2022-07-22 11:04:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:38,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615516484] [2022-07-22 11:04:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:38,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:38,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615516484] [2022-07-22 11:04:38,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615516484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:38,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:38,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:38,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514948215] [2022-07-22 11:04:38,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:38,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:38,546 INFO L87 Difference]: Start difference. First operand 116 states and 167 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:38,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:38,647 INFO L93 Difference]: Finished difference Result 212 states and 304 transitions. [2022-07-22 11:04:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:38,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-07-22 11:04:38,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:38,650 INFO L225 Difference]: With dead ends: 212 [2022-07-22 11:04:38,650 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 11:04:38,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:38,652 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:38,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 192 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 11:04:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 117. [2022-07-22 11:04:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.3608247422680413) internal successors, (132), 100 states have internal predecessors, (132), 13 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (21), 12 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-22 11:04:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 166 transitions. [2022-07-22 11:04:38,667 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 166 transitions. Word has length 43 [2022-07-22 11:04:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:38,668 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 166 transitions. [2022-07-22 11:04:38,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 166 transitions. [2022-07-22 11:04:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:38,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:38,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 11:04:38,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 11:04:38,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1481319558, now seen corresponding path program 1 times [2022-07-22 11:04:38,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:38,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499138442] [2022-07-22 11:04:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 11:04:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:38,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:38,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499138442] [2022-07-22 11:04:38,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499138442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:38,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:38,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-07-22 11:04:38,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582170821] [2022-07-22 11:04:38,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:38,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 11:04:38,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:38,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 11:04:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-07-22 11:04:38,997 INFO L87 Difference]: Start difference. First operand 117 states and 166 transitions. Second operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-22 11:04:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:40,387 INFO L93 Difference]: Finished difference Result 250 states and 358 transitions. [2022-07-22 11:04:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 11:04:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-07-22 11:04:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:40,391 INFO L225 Difference]: With dead ends: 250 [2022-07-22 11:04:40,391 INFO L226 Difference]: Without dead ends: 242 [2022-07-22 11:04:40,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-07-22 11:04:40,392 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 309 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:40,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 416 Invalid, 2606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2559 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 11:04:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-22 11:04:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 122. [2022-07-22 11:04:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 103 states have internal predecessors, (136), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (22), 14 states have call predecessors, (22), 13 states have call successors, (22) [2022-07-22 11:04:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 172 transitions. [2022-07-22 11:04:40,419 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 172 transitions. Word has length 44 [2022-07-22 11:04:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:40,420 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 172 transitions. [2022-07-22 11:04:40,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-22 11:04:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 172 transitions. [2022-07-22 11:04:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:04:40,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:40,432 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 11:04:40,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 11:04:40,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2095142826, now seen corresponding path program 1 times [2022-07-22 11:04:40,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:40,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347189266] [2022-07-22 11:04:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:40,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 11:04:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 11:04:40,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:40,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347189266] [2022-07-22 11:04:40,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347189266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:40,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:40,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:04:40,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366650747] [2022-07-22 11:04:40,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:40,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:04:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:04:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:04:40,528 INFO L87 Difference]: Start difference. First operand 122 states and 172 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 11:04:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:40,930 INFO L93 Difference]: Finished difference Result 179 states and 251 transitions. [2022-07-22 11:04:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:04:40,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-07-22 11:04:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:40,932 INFO L225 Difference]: With dead ends: 179 [2022-07-22 11:04:40,932 INFO L226 Difference]: Without dead ends: 168 [2022-07-22 11:04:40,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-22 11:04:40,933 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 218 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:40,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 225 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:04:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-22 11:04:40,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2022-07-22 11:04:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 98 states have (on average 1.346938775510204) internal successors, (132), 101 states have internal predecessors, (132), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-22 11:04:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 167 transitions. [2022-07-22 11:04:40,944 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 167 transitions. Word has length 46 [2022-07-22 11:04:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:40,944 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 167 transitions. [2022-07-22 11:04:40,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 11:04:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 167 transitions. [2022-07-22 11:04:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:04:40,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:40,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:40,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 11:04:40,947 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash -937140365, now seen corresponding path program 1 times [2022-07-22 11:04:40,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:40,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496359847] [2022-07-22 11:04:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:40,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:04:41,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:41,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496359847] [2022-07-22 11:04:41,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496359847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:41,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:41,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 11:04:41,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129864356] [2022-07-22 11:04:41,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:41,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:04:41,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:41,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:04:41,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:04:41,028 INFO L87 Difference]: Start difference. First operand 119 states and 167 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:41,424 INFO L93 Difference]: Finished difference Result 222 states and 310 transitions. [2022-07-22 11:04:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:04:41,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2022-07-22 11:04:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:41,426 INFO L225 Difference]: With dead ends: 222 [2022-07-22 11:04:41,426 INFO L226 Difference]: Without dead ends: 166 [2022-07-22 11:04:41,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:04:41,428 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 160 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:41,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 488 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:04:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-22 11:04:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 125. [2022-07-22 11:04:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.3300970873786409) internal successors, (137), 106 states have internal predecessors, (137), 14 states have call successors, (14), 5 states have call predecessors, (14), 7 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-22 11:04:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2022-07-22 11:04:41,441 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 46 [2022-07-22 11:04:41,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:41,442 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2022-07-22 11:04:41,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:41,442 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2022-07-22 11:04:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:04:41,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:41,444 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:04:41,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 11:04:41,445 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash -783122765, now seen corresponding path program 1 times [2022-07-22 11:04:41,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:41,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038291628] [2022-07-22 11:04:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:41,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:04:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:04:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:04:41,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:41,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038291628] [2022-07-22 11:04:41,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038291628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:41,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675558811] [2022-07-22 11:04:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:41,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:41,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:41,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:41,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:04:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:41,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 11:04:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:42,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:04:42,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675558811] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:42,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:42,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 13] total 34 [2022-07-22 11:04:42,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955023157] [2022-07-22 11:04:42,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:42,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 11:04:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 11:04:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 11:04:42,447 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 34 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 11:04:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:48,262 INFO L93 Difference]: Finished difference Result 483 states and 761 transitions. [2022-07-22 11:04:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-22 11:04:48,263 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2022-07-22 11:04:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:48,266 INFO L225 Difference]: With dead ends: 483 [2022-07-22 11:04:48,266 INFO L226 Difference]: Without dead ends: 472 [2022-07-22 11:04:48,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=739, Invalid=6233, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 11:04:48,269 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 874 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 9013 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 9206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 9013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:48,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 741 Invalid, 9206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 9013 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-22 11:04:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-07-22 11:04:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 164. [2022-07-22 11:04:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 131 states have (on average 1.282442748091603) internal successors, (168), 137 states have internal predecessors, (168), 21 states have call successors, (21), 5 states have call predecessors, (21), 11 states have return successors, (58), 21 states have call predecessors, (58), 19 states have call successors, (58) [2022-07-22 11:04:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 247 transitions. [2022-07-22 11:04:48,304 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 247 transitions. Word has length 48 [2022-07-22 11:04:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:48,304 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 247 transitions. [2022-07-22 11:04:48,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 25 states have internal predecessors, (53), 6 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 11:04:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 247 transitions. [2022-07-22 11:04:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:04:48,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:48,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:04:48,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:48,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-22 11:04:48,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:48,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1231057781, now seen corresponding path program 2 times [2022-07-22 11:04:48,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:48,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195740832] [2022-07-22 11:04:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:48,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:48,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:48,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:48,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:48,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:04:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:48,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:04:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:04:48,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:48,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195740832] [2022-07-22 11:04:48,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195740832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:48,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611893543] [2022-07-22 11:04:48,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:04:48,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:48,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:48,736 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:48,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:04:48,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:04:48,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:04:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 11:04:48,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:48,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:49,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611893543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:49,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:49,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-07-22 11:04:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134580301] [2022-07-22 11:04:49,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 11:04:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 11:04:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=804, Unknown=0, NotChecked=0, Total=870 [2022-07-22 11:04:49,226 INFO L87 Difference]: Start difference. First operand 164 states and 247 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 11 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-22 11:04:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:52,148 INFO L93 Difference]: Finished difference Result 348 states and 666 transitions. [2022-07-22 11:04:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 11:04:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 11 states have call predecessors, (13), 6 states have call successors, (13) Word has length 48 [2022-07-22 11:04:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:52,151 INFO L225 Difference]: With dead ends: 348 [2022-07-22 11:04:52,151 INFO L226 Difference]: Without dead ends: 341 [2022-07-22 11:04:52,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=378, Invalid=3282, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 11:04:52,154 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 784 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 5160 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 5352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 5160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:52,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 466 Invalid, 5352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 5160 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 11:04:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-22 11:04:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 172. [2022-07-22 11:04:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 141 states have internal predecessors, (172), 25 states have call successors, (25), 5 states have call predecessors, (25), 11 states have return successors, (73), 25 states have call predecessors, (73), 23 states have call successors, (73) [2022-07-22 11:04:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 270 transitions. [2022-07-22 11:04:52,178 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 270 transitions. Word has length 48 [2022-07-22 11:04:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:52,179 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 270 transitions. [2022-07-22 11:04:52,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 11 states have call predecessors, (13), 6 states have call successors, (13) [2022-07-22 11:04:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 270 transitions. [2022-07-22 11:04:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:04:52,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:52,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:04:52,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:52,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:52,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:52,400 INFO L85 PathProgramCache]: Analyzing trace with hash -415034277, now seen corresponding path program 1 times [2022-07-22 11:04:52,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:52,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432094682] [2022-07-22 11:04:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:52,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:52,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:52,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:52,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:04:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:52,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:04:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:52,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432094682] [2022-07-22 11:04:52,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432094682] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:52,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103100372] [2022-07-22 11:04:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:52,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:52,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:52,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:52,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:04:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 11:04:52,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 11:04:52,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:52,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103100372] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:52,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:52,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 24 [2022-07-22 11:04:52,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789217208] [2022-07-22 11:04:52,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:52,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 11:04:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 11:04:52,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:04:52,940 INFO L87 Difference]: Start difference. First operand 172 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 18 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 11:04:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:54,775 INFO L93 Difference]: Finished difference Result 342 states and 587 transitions. [2022-07-22 11:04:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 11:04:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 18 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 50 [2022-07-22 11:04:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:54,778 INFO L225 Difference]: With dead ends: 342 [2022-07-22 11:04:54,778 INFO L226 Difference]: Without dead ends: 331 [2022-07-22 11:04:54,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=1648, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 11:04:54,779 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 384 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 3883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:54,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 536 Invalid, 3883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 11:04:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-07-22 11:04:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 172. [2022-07-22 11:04:54,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 141 states have internal predecessors, (172), 25 states have call successors, (25), 5 states have call predecessors, (25), 11 states have return successors, (73), 25 states have call predecessors, (73), 23 states have call successors, (73) [2022-07-22 11:04:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 270 transitions. [2022-07-22 11:04:54,804 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 270 transitions. Word has length 50 [2022-07-22 11:04:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:54,804 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 270 transitions. [2022-07-22 11:04:54,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 18 states have internal predecessors, (56), 6 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 11:04:54,805 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 270 transitions. [2022-07-22 11:04:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:04:54,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:54,806 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:04:54,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 11:04:55,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:55,019 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2054485403, now seen corresponding path program 1 times [2022-07-22 11:04:55,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:55,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753551947] [2022-07-22 11:04:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:55,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:55,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:55,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:04:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:55,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:04:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:55,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-22 11:04:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:04:55,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:55,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753551947] [2022-07-22 11:04:55,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753551947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:55,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354076790] [2022-07-22 11:04:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:55,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:55,212 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:55,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:04:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:55,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:04:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:55,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:55,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354076790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:55,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:55,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 31 [2022-07-22 11:04:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697006693] [2022-07-22 11:04:55,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:55,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 11:04:55,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:55,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 11:04:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2022-07-22 11:04:55,660 INFO L87 Difference]: Start difference. First operand 172 states and 270 transitions. Second operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-22 11:04:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:58,594 INFO L93 Difference]: Finished difference Result 343 states and 632 transitions. [2022-07-22 11:04:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 11:04:58,594 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) Word has length 50 [2022-07-22 11:04:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:58,598 INFO L225 Difference]: With dead ends: 343 [2022-07-22 11:04:58,598 INFO L226 Difference]: Without dead ends: 320 [2022-07-22 11:04:58,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=449, Invalid=4107, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 11:04:58,601 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 760 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 4582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:58,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 457 Invalid, 4582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 11:04:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-07-22 11:04:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 180. [2022-07-22 11:04:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 140 states have (on average 1.2642857142857142) internal successors, (177), 145 states have internal predecessors, (177), 28 states have call successors, (28), 5 states have call predecessors, (28), 11 states have return successors, (82), 29 states have call predecessors, (82), 26 states have call successors, (82) [2022-07-22 11:04:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 287 transitions. [2022-07-22 11:04:58,637 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 287 transitions. Word has length 50 [2022-07-22 11:04:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:58,639 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 287 transitions. [2022-07-22 11:04:58,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 23 states have internal predecessors, (62), 5 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (13), 9 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-22 11:04:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 287 transitions. [2022-07-22 11:04:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:04:58,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:58,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:04:58,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:58,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 11:04:58,864 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash 904908130, now seen corresponding path program 1 times [2022-07-22 11:04:58,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:58,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201135931] [2022-07-22 11:04:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:58,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:58,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:58,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:58,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:58,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201135931] [2022-07-22 11:04:58,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201135931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:58,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:58,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:58,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775541454] [2022-07-22 11:04:58,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:58,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:58,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:58,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:58,927 INFO L87 Difference]: Start difference. First operand 180 states and 287 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:59,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:59,006 INFO L93 Difference]: Finished difference Result 304 states and 499 transitions. [2022-07-22 11:04:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:59,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-07-22 11:04:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:59,009 INFO L225 Difference]: With dead ends: 304 [2022-07-22 11:04:59,009 INFO L226 Difference]: Without dead ends: 188 [2022-07-22 11:04:59,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:59,011 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 94 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:59,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 191 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-22 11:04:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 180. [2022-07-22 11:04:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 140 states have (on average 1.2571428571428571) internal successors, (176), 145 states have internal predecessors, (176), 28 states have call successors, (28), 5 states have call predecessors, (28), 11 states have return successors, (82), 29 states have call predecessors, (82), 26 states have call successors, (82) [2022-07-22 11:04:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 286 transitions. [2022-07-22 11:04:59,026 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 286 transitions. Word has length 50 [2022-07-22 11:04:59,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:59,027 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 286 transitions. [2022-07-22 11:04:59,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:04:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 286 transitions. [2022-07-22 11:04:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:04:59,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:59,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:04:59,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:04:59,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1570607968, now seen corresponding path program 1 times [2022-07-22 11:04:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:59,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744596603] [2022-07-22 11:04:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-22 11:04:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:04:59,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:59,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744596603] [2022-07-22 11:04:59,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744596603] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:59,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:59,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:59,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086020261] [2022-07-22 11:04:59,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:59,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:59,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:59,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:59,070 INFO L87 Difference]: Start difference. First operand 180 states and 286 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:04:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:59,305 INFO L93 Difference]: Finished difference Result 426 states and 699 transitions. [2022-07-22 11:04:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:04:59,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-07-22 11:04:59,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:59,307 INFO L225 Difference]: With dead ends: 426 [2022-07-22 11:04:59,307 INFO L226 Difference]: Without dead ends: 263 [2022-07-22 11:04:59,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:04:59,310 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 226 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:59,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 183 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:59,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-22 11:04:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 181. [2022-07-22 11:04:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 141 states have (on average 1.2553191489361701) internal successors, (177), 146 states have internal predecessors, (177), 28 states have call successors, (28), 5 states have call predecessors, (28), 11 states have return successors, (82), 29 states have call predecessors, (82), 26 states have call successors, (82) [2022-07-22 11:04:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 287 transitions. [2022-07-22 11:04:59,329 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 287 transitions. Word has length 52 [2022-07-22 11:04:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:59,329 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 287 transitions. [2022-07-22 11:04:59,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:04:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 287 transitions. [2022-07-22 11:04:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 11:04:59,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:59,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:04:59,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 11:04:59,331 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash -258774659, now seen corresponding path program 1 times [2022-07-22 11:04:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:59,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261775948] [2022-07-22 11:04:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:59,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 11:04:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 11:04:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:59,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261775948] [2022-07-22 11:04:59,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261775948] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438737992] [2022-07-22 11:04:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:59,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:59,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:59,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:59,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:04:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:59,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 11:04:59,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:04:59,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:05:00,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438737992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:00,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:05:00,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-07-22 11:05:00,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810293218] [2022-07-22 11:05:00,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:00,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 11:05:00,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:00,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 11:05:00,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 11:05:00,069 INFO L87 Difference]: Start difference. First operand 181 states and 287 transitions. Second operand has 36 states, 32 states have (on average 2.21875) internal successors, (71), 28 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-22 11:05:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:06,141 INFO L93 Difference]: Finished difference Result 673 states and 1211 transitions. [2022-07-22 11:05:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-22 11:05:06,142 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.21875) internal successors, (71), 28 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 53 [2022-07-22 11:05:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:06,146 INFO L225 Difference]: With dead ends: 673 [2022-07-22 11:05:06,146 INFO L226 Difference]: Without dead ends: 553 [2022-07-22 11:05:06,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=836, Invalid=8284, Unknown=0, NotChecked=0, Total=9120 [2022-07-22 11:05:06,150 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 1227 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 9109 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 9365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 9109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:06,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1261 Valid, 833 Invalid, 9365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 9109 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-22 11:05:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-07-22 11:05:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 226. [2022-07-22 11:05:06,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 171 states have (on average 1.2514619883040936) internal successors, (214), 179 states have internal predecessors, (214), 40 states have call successors, (40), 5 states have call predecessors, (40), 14 states have return successors, (153), 41 states have call predecessors, (153), 38 states have call successors, (153) [2022-07-22 11:05:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 407 transitions. [2022-07-22 11:05:06,187 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 407 transitions. Word has length 53 [2022-07-22 11:05:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:06,188 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 407 transitions. [2022-07-22 11:05:06,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.21875) internal successors, (71), 28 states have internal predecessors, (71), 6 states have call successors, (12), 4 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-07-22 11:05:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 407 transitions. [2022-07-22 11:05:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 11:05:06,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:06,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:06,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:06,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:06,414 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1119045026, now seen corresponding path program 1 times [2022-07-22 11:05:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:06,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171178351] [2022-07-22 11:05:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:06,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:06,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:05:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:06,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 11:05:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:06,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 11:05:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:05:06,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:06,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171178351] [2022-07-22 11:05:06,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171178351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:06,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132417193] [2022-07-22 11:05:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:06,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:06,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:06,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:06,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 11:05:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:06,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 11:05:06,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:05:06,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:05:06,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132417193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:06,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:05:06,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 9] total 20 [2022-07-22 11:05:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048380469] [2022-07-22 11:05:06,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 11:05:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 11:05:06,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-22 11:05:06,799 INFO L87 Difference]: Start difference. First operand 226 states and 407 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-22 11:05:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:08,632 INFO L93 Difference]: Finished difference Result 607 states and 1262 transitions. [2022-07-22 11:05:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 11:05:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 53 [2022-07-22 11:05:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:08,636 INFO L225 Difference]: With dead ends: 607 [2022-07-22 11:05:08,636 INFO L226 Difference]: Without dead ends: 396 [2022-07-22 11:05:08,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 11:05:08,641 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 535 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:08,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 529 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3169 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 11:05:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-22 11:05:08,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 257. [2022-07-22 11:05:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 192 states have (on average 1.2395833333333333) internal successors, (238), 201 states have internal predecessors, (238), 49 states have call successors, (49), 5 states have call predecessors, (49), 15 states have return successors, (206), 50 states have call predecessors, (206), 47 states have call successors, (206) [2022-07-22 11:05:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 493 transitions. [2022-07-22 11:05:08,675 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 493 transitions. Word has length 53 [2022-07-22 11:05:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:08,675 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 493 transitions. [2022-07-22 11:05:08,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-07-22 11:05:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 493 transitions. [2022-07-22 11:05:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-22 11:05:08,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:08,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:08,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:08,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:08,891 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash 960202435, now seen corresponding path program 1 times [2022-07-22 11:05:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:08,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904764234] [2022-07-22 11:05:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:08,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:08,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:05:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:08,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904764234] [2022-07-22 11:05:08,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904764234] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:08,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314818766] [2022-07-22 11:05:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:08,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:08,970 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:08,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 11:05:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:05:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:09,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:09,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314818766] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:09,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:05:09,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-07-22 11:05:09,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581303729] [2022-07-22 11:05:09,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:09,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 11:05:09,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:09,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 11:05:09,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:05:09,200 INFO L87 Difference]: Start difference. First operand 257 states and 493 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:05:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:10,028 INFO L93 Difference]: Finished difference Result 612 states and 1340 transitions. [2022-07-22 11:05:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 11:05:10,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2022-07-22 11:05:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:10,034 INFO L225 Difference]: With dead ends: 612 [2022-07-22 11:05:10,034 INFO L226 Difference]: Without dead ends: 495 [2022-07-22 11:05:10,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:05:10,036 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 237 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:10,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 848 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:05:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-07-22 11:05:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 269. [2022-07-22 11:05:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 203 states have (on average 1.2315270935960592) internal successors, (250), 213 states have internal predecessors, (250), 47 states have call successors, (47), 7 states have call predecessors, (47), 18 states have return successors, (196), 48 states have call predecessors, (196), 45 states have call successors, (196) [2022-07-22 11:05:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 493 transitions. [2022-07-22 11:05:10,095 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 493 transitions. Word has length 53 [2022-07-22 11:05:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:10,095 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 493 transitions. [2022-07-22 11:05:10,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 13 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:05:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 493 transitions. [2022-07-22 11:05:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 11:05:10,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:10,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:10,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:10,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 11:05:10,321 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:10,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash 896532657, now seen corresponding path program 1 times [2022-07-22 11:05:10,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:10,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577988370] [2022-07-22 11:05:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:10,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-22 11:05:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 11:05:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 11:05:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 11:05:10,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:10,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577988370] [2022-07-22 11:05:10,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577988370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044948107] [2022-07-22 11:05:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:10,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:10,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:10,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 11:05:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:05:10,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:05:10,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:10,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044948107] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:10,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:05:10,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-07-22 11:05:10,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179672230] [2022-07-22 11:05:10,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:10,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:05:10,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:05:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:05:10,464 INFO L87 Difference]: Start difference. First operand 269 states and 493 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:05:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:10,521 INFO L93 Difference]: Finished difference Result 496 states and 883 transitions. [2022-07-22 11:05:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:05:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-07-22 11:05:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:10,524 INFO L225 Difference]: With dead ends: 496 [2022-07-22 11:05:10,524 INFO L226 Difference]: Without dead ends: 276 [2022-07-22 11:05:10,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:05:10,527 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 14 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:10,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 334 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:05:10,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-22 11:05:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 270. [2022-07-22 11:05:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 204 states have (on average 1.2352941176470589) internal successors, (252), 214 states have internal predecessors, (252), 47 states have call successors, (47), 7 states have call predecessors, (47), 18 states have return successors, (196), 48 states have call predecessors, (196), 45 states have call successors, (196) [2022-07-22 11:05:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 495 transitions. [2022-07-22 11:05:10,559 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 495 transitions. Word has length 54 [2022-07-22 11:05:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:10,560 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 495 transitions. [2022-07-22 11:05:10,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:05:10,560 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 495 transitions. [2022-07-22 11:05:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 11:05:10,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:10,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:10,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:10,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 11:05:10,775 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1591568488, now seen corresponding path program 1 times [2022-07-22 11:05:10,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:10,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54439653] [2022-07-22 11:05:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:10,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 11:05:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:10,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 11:05:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:11,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 11:05:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:05:11,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54439653] [2022-07-22 11:05:11,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54439653] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:11,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:11,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-22 11:05:11,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893461197] [2022-07-22 11:05:11,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:11,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 11:05:11,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:11,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 11:05:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:05:11,079 INFO L87 Difference]: Start difference. First operand 270 states and 495 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:05:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:12,471 INFO L93 Difference]: Finished difference Result 399 states and 824 transitions. [2022-07-22 11:05:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 11:05:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2022-07-22 11:05:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:12,475 INFO L225 Difference]: With dead ends: 399 [2022-07-22 11:05:12,475 INFO L226 Difference]: Without dead ends: 388 [2022-07-22 11:05:12,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-07-22 11:05:12,476 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 328 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:12,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 297 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 11:05:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-22 11:05:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 268. [2022-07-22 11:05:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 203 states have (on average 1.2364532019704433) internal successors, (251), 213 states have internal predecessors, (251), 46 states have call successors, (46), 7 states have call predecessors, (46), 18 states have return successors, (195), 47 states have call predecessors, (195), 44 states have call successors, (195) [2022-07-22 11:05:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 492 transitions. [2022-07-22 11:05:12,517 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 492 transitions. Word has length 55 [2022-07-22 11:05:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:12,518 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 492 transitions. [2022-07-22 11:05:12,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:05:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 492 transitions. [2022-07-22 11:05:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:05:12,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:12,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:12,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 11:05:12,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1366808055, now seen corresponding path program 1 times [2022-07-22 11:05:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:12,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094800325] [2022-07-22 11:05:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:12,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:12,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:12,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:05:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:12,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:05:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:12,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:12,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094800325] [2022-07-22 11:05:12,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094800325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:12,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640113313] [2022-07-22 11:05:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:12,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:12,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:12,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 11:05:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:12,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:05:12,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:12,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:12,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640113313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:12,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:05:12,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2022-07-22 11:05:12,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413209520] [2022-07-22 11:05:12,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:12,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:05:12,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:12,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:05:12,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:05:12,783 INFO L87 Difference]: Start difference. First operand 268 states and 492 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:12,979 INFO L93 Difference]: Finished difference Result 713 states and 1456 transitions. [2022-07-22 11:05:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 11:05:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-22 11:05:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:12,984 INFO L225 Difference]: With dead ends: 713 [2022-07-22 11:05:12,984 INFO L226 Difference]: Without dead ends: 656 [2022-07-22 11:05:12,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-07-22 11:05:12,986 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 447 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:12,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1209 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:05:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-07-22 11:05:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 367. [2022-07-22 11:05:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 289 states have (on average 1.245674740484429) internal successors, (360), 303 states have internal predecessors, (360), 54 states have call successors, (54), 8 states have call predecessors, (54), 23 states have return successors, (208), 55 states have call predecessors, (208), 51 states have call successors, (208) [2022-07-22 11:05:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 622 transitions. [2022-07-22 11:05:13,050 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 622 transitions. Word has length 57 [2022-07-22 11:05:13,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:13,050 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 622 transitions. [2022-07-22 11:05:13,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 8 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 622 transitions. [2022-07-22 11:05:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:05:13,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:13,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:13,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:13,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 11:05:13,267 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:13,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:13,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1759835065, now seen corresponding path program 1 times [2022-07-22 11:05:13,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:13,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361725548] [2022-07-22 11:05:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:13,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:13,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:13,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:05:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:13,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:05:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:13,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361725548] [2022-07-22 11:05:13,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361725548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312525463] [2022-07-22 11:05:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:13,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:13,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:13,364 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:13,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 11:05:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:05:13,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:13,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:13,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312525463] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:13,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:05:13,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-07-22 11:05:13,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000183261] [2022-07-22 11:05:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:13,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:05:13,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:05:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:05:13,539 INFO L87 Difference]: Start difference. First operand 367 states and 622 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:13,748 INFO L93 Difference]: Finished difference Result 940 states and 1800 transitions. [2022-07-22 11:05:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 11:05:13,748 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-22 11:05:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:13,753 INFO L225 Difference]: With dead ends: 940 [2022-07-22 11:05:13,753 INFO L226 Difference]: Without dead ends: 759 [2022-07-22 11:05:13,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:05:13,755 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 376 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:13,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1123 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:05:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-07-22 11:05:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 429. [2022-07-22 11:05:13,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 339 states have (on average 1.247787610619469) internal successors, (423), 355 states have internal predecessors, (423), 63 states have call successors, (63), 9 states have call predecessors, (63), 26 states have return successors, (223), 64 states have call predecessors, (223), 59 states have call successors, (223) [2022-07-22 11:05:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 709 transitions. [2022-07-22 11:05:13,828 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 709 transitions. Word has length 57 [2022-07-22 11:05:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:13,829 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 709 transitions. [2022-07-22 11:05:13,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 709 transitions. [2022-07-22 11:05:13,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:05:13,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:13,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 11:05:13,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:14,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:14,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1500821561, now seen corresponding path program 1 times [2022-07-22 11:05:14,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:14,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87521144] [2022-07-22 11:05:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:14,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:05:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:05:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:14,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:14,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87521144] [2022-07-22 11:05:14,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87521144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:14,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188247257] [2022-07-22 11:05:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:14,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:14,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:14,125 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:14,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 11:05:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:05:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:14,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:14,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188247257] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:14,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:05:14,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-07-22 11:05:14,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190721155] [2022-07-22 11:05:14,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:14,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:05:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:05:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-07-22 11:05:14,280 INFO L87 Difference]: Start difference. First operand 429 states and 709 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:14,376 INFO L93 Difference]: Finished difference Result 567 states and 1011 transitions. [2022-07-22 11:05:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:05:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2022-07-22 11:05:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:14,380 INFO L225 Difference]: With dead ends: 567 [2022-07-22 11:05:14,380 INFO L226 Difference]: Without dead ends: 476 [2022-07-22 11:05:14,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-22 11:05:14,381 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 53 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:14,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1163 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:05:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-07-22 11:05:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 353. [2022-07-22 11:05:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 278 states have (on average 1.2625899280575539) internal successors, (351), 292 states have internal predecessors, (351), 53 states have call successors, (53), 6 states have call predecessors, (53), 21 states have return successors, (201), 54 states have call predecessors, (201), 50 states have call successors, (201) [2022-07-22 11:05:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 605 transitions. [2022-07-22 11:05:14,432 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 605 transitions. Word has length 57 [2022-07-22 11:05:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:14,432 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 605 transitions. [2022-07-22 11:05:14,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 7 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 605 transitions. [2022-07-22 11:05:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:05:14,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:14,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:14,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:14,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:14,658 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash -267239054, now seen corresponding path program 2 times [2022-07-22 11:05:14,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:14,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72717133] [2022-07-22 11:05:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:14,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:05:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:05:14,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:14,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72717133] [2022-07-22 11:05:14,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72717133] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:14,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:14,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 11:05:14,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084048416] [2022-07-22 11:05:14,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:14,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:14,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:14,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:14,739 INFO L87 Difference]: Start difference. First operand 353 states and 605 transitions. Second operand has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:15,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:15,257 INFO L93 Difference]: Finished difference Result 797 states and 1460 transitions. [2022-07-22 11:05:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 11:05:15,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2022-07-22 11:05:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:15,260 INFO L225 Difference]: With dead ends: 797 [2022-07-22 11:05:15,260 INFO L226 Difference]: Without dead ends: 548 [2022-07-22 11:05:15,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:05:15,264 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 432 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:15,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 593 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:05:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-07-22 11:05:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 454. [2022-07-22 11:05:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 371 states have (on average 1.2425876010781671) internal successors, (461), 388 states have internal predecessors, (461), 56 states have call successors, (56), 8 states have call predecessors, (56), 26 states have return successors, (191), 57 states have call predecessors, (191), 53 states have call successors, (191) [2022-07-22 11:05:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 708 transitions. [2022-07-22 11:05:15,319 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 708 transitions. Word has length 57 [2022-07-22 11:05:15,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:15,319 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 708 transitions. [2022-07-22 11:05:15,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 708 transitions. [2022-07-22 11:05:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:05:15,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:15,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:15,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 11:05:15,322 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1278356304, now seen corresponding path program 1 times [2022-07-22 11:05:15,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:15,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721816141] [2022-07-22 11:05:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:15,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:15,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:15,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:15,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:05:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:05:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721816141] [2022-07-22 11:05:15,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721816141] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:15,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707188344] [2022-07-22 11:05:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:15,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:15,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:15,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:15,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 11:05:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 11:05:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:05:15,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:05:15,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707188344] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:15,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:15,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11, 10] total 12 [2022-07-22 11:05:15,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17969320] [2022-07-22 11:05:15,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:15,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:05:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:05:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:05:15,542 INFO L87 Difference]: Start difference. First operand 454 states and 708 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:15,601 INFO L93 Difference]: Finished difference Result 773 states and 1323 transitions. [2022-07-22 11:05:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:05:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2022-07-22 11:05:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:15,604 INFO L225 Difference]: With dead ends: 773 [2022-07-22 11:05:15,604 INFO L226 Difference]: Without dead ends: 474 [2022-07-22 11:05:15,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:05:15,609 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:15,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 225 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:05:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-22 11:05:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2022-07-22 11:05:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 391 states have (on average 1.225063938618926) internal successors, (479), 408 states have internal predecessors, (479), 56 states have call successors, (56), 8 states have call predecessors, (56), 26 states have return successors, (191), 57 states have call predecessors, (191), 53 states have call successors, (191) [2022-07-22 11:05:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 726 transitions. [2022-07-22 11:05:15,665 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 726 transitions. Word has length 57 [2022-07-22 11:05:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:15,665 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 726 transitions. [2022-07-22 11:05:15,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 726 transitions. [2022-07-22 11:05:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:05:15,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:15,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:15,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:15,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 11:05:15,888 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1276509262, now seen corresponding path program 1 times [2022-07-22 11:05:15,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:15,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673998489] [2022-07-22 11:05:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:15,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:15,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:15,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:16,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:05:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:05:16,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:16,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673998489] [2022-07-22 11:05:16,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673998489] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:16,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:16,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 11:05:16,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237807144] [2022-07-22 11:05:16,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:16,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:16,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:16,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:16,023 INFO L87 Difference]: Start difference. First operand 474 states and 726 transitions. Second operand has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:05:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:16,557 INFO L93 Difference]: Finished difference Result 788 states and 1126 transitions. [2022-07-22 11:05:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:05:16,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-07-22 11:05:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:16,560 INFO L225 Difference]: With dead ends: 788 [2022-07-22 11:05:16,560 INFO L226 Difference]: Without dead ends: 614 [2022-07-22 11:05:16,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-07-22 11:05:16,562 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 210 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:16,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 684 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:05:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-07-22 11:05:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 576. [2022-07-22 11:05:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 484 states have (on average 1.225206611570248) internal successors, (593), 503 states have internal predecessors, (593), 61 states have call successors, (61), 10 states have call predecessors, (61), 30 states have return successors, (192), 62 states have call predecessors, (192), 58 states have call successors, (192) [2022-07-22 11:05:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 846 transitions. [2022-07-22 11:05:16,622 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 846 transitions. Word has length 57 [2022-07-22 11:05:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:16,622 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 846 transitions. [2022-07-22 11:05:16,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:05:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 846 transitions. [2022-07-22 11:05:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 11:05:16,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:16,625 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:16,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 11:05:16,625 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:16,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:16,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1410522768, now seen corresponding path program 1 times [2022-07-22 11:05:16,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:16,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035587815] [2022-07-22 11:05:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:16,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:16,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:16,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:16,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:05:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:05:16,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035587815] [2022-07-22 11:05:16,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035587815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:16,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:16,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-07-22 11:05:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304287998] [2022-07-22 11:05:16,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:16,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 11:05:16,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:16,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 11:05:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:05:16,842 INFO L87 Difference]: Start difference. First operand 576 states and 846 transitions. Second operand has 15 states, 13 states have (on average 3.076923076923077) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:05:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:17,507 INFO L93 Difference]: Finished difference Result 715 states and 1031 transitions. [2022-07-22 11:05:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:05:17,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.076923076923077) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-07-22 11:05:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:17,514 INFO L225 Difference]: With dead ends: 715 [2022-07-22 11:05:17,514 INFO L226 Difference]: Without dead ends: 608 [2022-07-22 11:05:17,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:05:17,515 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 268 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:17,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 860 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:05:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-07-22 11:05:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 570. [2022-07-22 11:05:17,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 477 states have (on average 1.220125786163522) internal successors, (582), 496 states have internal predecessors, (582), 61 states have call successors, (61), 11 states have call predecessors, (61), 31 states have return successors, (192), 62 states have call predecessors, (192), 58 states have call successors, (192) [2022-07-22 11:05:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 835 transitions. [2022-07-22 11:05:17,581 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 835 transitions. Word has length 57 [2022-07-22 11:05:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:17,581 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 835 transitions. [2022-07-22 11:05:17,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.076923076923077) internal successors, (40), 10 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:05:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 835 transitions. [2022-07-22 11:05:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 11:05:17,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:17,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:17,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 11:05:17,584 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1069512791, now seen corresponding path program 1 times [2022-07-22 11:05:17,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:17,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664499755] [2022-07-22 11:05:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:17,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:17,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:17,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:17,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 11:05:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:17,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 11:05:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:17,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 11:05:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 11:05:17,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:17,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664499755] [2022-07-22 11:05:17,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664499755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:17,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065884339] [2022-07-22 11:05:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:17,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:17,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:17,686 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:17,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 11:05:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 11:05:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:05:17,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:05:18,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065884339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:18,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:05:18,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-07-22 11:05:18,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688578300] [2022-07-22 11:05:18,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 11:05:18,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 11:05:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:05:18,066 INFO L87 Difference]: Start difference. First operand 570 states and 835 transitions. Second operand has 23 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 5 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 11:05:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:20,864 INFO L93 Difference]: Finished difference Result 980 states and 1544 transitions. [2022-07-22 11:05:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 11:05:20,866 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 5 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 59 [2022-07-22 11:05:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:20,870 INFO L225 Difference]: With dead ends: 980 [2022-07-22 11:05:20,870 INFO L226 Difference]: Without dead ends: 793 [2022-07-22 11:05:20,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=484, Invalid=2596, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 11:05:20,872 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 616 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4643 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 4752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 4643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:20,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 530 Invalid, 4752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 4643 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 11:05:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-07-22 11:05:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 566. [2022-07-22 11:05:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 475 states have (on average 1.2147368421052631) internal successors, (577), 494 states have internal predecessors, (577), 59 states have call successors, (59), 11 states have call predecessors, (59), 31 states have return successors, (182), 60 states have call predecessors, (182), 56 states have call successors, (182) [2022-07-22 11:05:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 818 transitions. [2022-07-22 11:05:20,955 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 818 transitions. Word has length 59 [2022-07-22 11:05:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:20,955 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 818 transitions. [2022-07-22 11:05:20,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.3) internal successors, (66), 18 states have internal predecessors, (66), 5 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-22 11:05:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 818 transitions. [2022-07-22 11:05:20,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:05:20,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:20,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:20,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:21,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:21,179 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2004112473, now seen corresponding path program 1 times [2022-07-22 11:05:21,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:21,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726833773] [2022-07-22 11:05:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:21,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:21,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:21,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:21,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:05:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:21,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 11:05:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:21,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 11:05:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:05:21,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:21,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726833773] [2022-07-22 11:05:21,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726833773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:21,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062402058] [2022-07-22 11:05:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:21,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:21,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:21,312 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:21,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 11:05:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:21,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 11:05:21,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 11:05:21,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 11:05:21,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062402058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:21,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:05:21,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 19 [2022-07-22 11:05:21,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474148610] [2022-07-22 11:05:21,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:21,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 11:05:21,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 11:05:21,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:05:21,592 INFO L87 Difference]: Start difference. First operand 566 states and 818 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 11:05:23,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:23,512 INFO L93 Difference]: Finished difference Result 1166 states and 1747 transitions. [2022-07-22 11:05:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 11:05:23,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2022-07-22 11:05:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:23,516 INFO L225 Difference]: With dead ends: 1166 [2022-07-22 11:05:23,516 INFO L226 Difference]: Without dead ends: 871 [2022-07-22 11:05:23,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 11:05:23,519 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 913 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:23,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 539 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 11:05:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-22 11:05:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 646. [2022-07-22 11:05:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 550 states have (on average 1.2054545454545456) internal successors, (663), 572 states have internal predecessors, (663), 59 states have call successors, (59), 13 states have call predecessors, (59), 36 states have return successors, (148), 60 states have call predecessors, (148), 56 states have call successors, (148) [2022-07-22 11:05:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 870 transitions. [2022-07-22 11:05:23,606 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 870 transitions. Word has length 60 [2022-07-22 11:05:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:23,606 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 870 transitions. [2022-07-22 11:05:23,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 11:05:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 870 transitions. [2022-07-22 11:05:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 11:05:23,608 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:23,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:23,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 11:05:23,836 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash -912833732, now seen corresponding path program 1 times [2022-07-22 11:05:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:23,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552935192] [2022-07-22 11:05:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:23,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:23,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:05:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:23,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 11:05:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:23,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:23,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552935192] [2022-07-22 11:05:23,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552935192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:23,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129353709] [2022-07-22 11:05:23,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:23,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:23,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:23,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:23,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 11:05:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:05:23,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:24,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:24,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129353709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:24,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:05:24,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2022-07-22 11:05:24,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243450956] [2022-07-22 11:05:24,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:24,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 11:05:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:24,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 11:05:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:05:24,172 INFO L87 Difference]: Start difference. First operand 646 states and 870 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 11:05:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:25,501 INFO L93 Difference]: Finished difference Result 1353 states and 1960 transitions. [2022-07-22 11:05:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:05:25,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 61 [2022-07-22 11:05:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:25,506 INFO L225 Difference]: With dead ends: 1353 [2022-07-22 11:05:25,506 INFO L226 Difference]: Without dead ends: 1130 [2022-07-22 11:05:25,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-07-22 11:05:25,508 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 358 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:25,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 408 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2863 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:05:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-07-22 11:05:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 619. [2022-07-22 11:05:25,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 531 states have (on average 1.2090395480225988) internal successors, (642), 551 states have internal predecessors, (642), 55 states have call successors, (55), 11 states have call predecessors, (55), 32 states have return successors, (138), 56 states have call predecessors, (138), 52 states have call successors, (138) [2022-07-22 11:05:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 835 transitions. [2022-07-22 11:05:25,584 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 835 transitions. Word has length 61 [2022-07-22 11:05:25,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:25,584 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 835 transitions. [2022-07-22 11:05:25,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 11:05:25,585 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 835 transitions. [2022-07-22 11:05:25,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:05:25,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:25,586 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:25,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:25,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 11:05:25,791 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1971885056, now seen corresponding path program 1 times [2022-07-22 11:05:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:25,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329317721] [2022-07-22 11:05:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:25,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:25,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:25,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:25,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:05:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:05:25,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:25,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329317721] [2022-07-22 11:05:25,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329317721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:25,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741434875] [2022-07-22 11:05:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:25,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:25,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:25,876 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:25,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 11:05:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:05:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:05:25,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:05:26,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741434875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:26,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:05:26,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-22 11:05:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943171934] [2022-07-22 11:05:26,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:26,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:26,033 INFO L87 Difference]: Start difference. First operand 619 states and 835 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:05:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:26,589 INFO L93 Difference]: Finished difference Result 1079 states and 1458 transitions. [2022-07-22 11:05:26,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 11:05:26,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2022-07-22 11:05:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:26,592 INFO L225 Difference]: With dead ends: 1079 [2022-07-22 11:05:26,593 INFO L226 Difference]: Without dead ends: 781 [2022-07-22 11:05:26,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:05:26,595 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 271 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:26,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 636 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:05:26,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-07-22 11:05:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 612. [2022-07-22 11:05:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 523 states have (on average 1.2084130019120458) internal successors, (632), 544 states have internal predecessors, (632), 55 states have call successors, (55), 11 states have call predecessors, (55), 33 states have return successors, (137), 56 states have call predecessors, (137), 52 states have call successors, (137) [2022-07-22 11:05:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 824 transitions. [2022-07-22 11:05:26,674 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 824 transitions. Word has length 60 [2022-07-22 11:05:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:26,675 INFO L495 AbstractCegarLoop]: Abstraction has 612 states and 824 transitions. [2022-07-22 11:05:26,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 8 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:05:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 824 transitions. [2022-07-22 11:05:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:05:26,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:26,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:26,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-22 11:05:26,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 11:05:26,877 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:26,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1645255748, now seen corresponding path program 1 times [2022-07-22 11:05:26,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:26,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425905345] [2022-07-22 11:05:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:26,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:26,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:26,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:26,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:05:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:05:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425905345] [2022-07-22 11:05:26,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425905345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:26,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538414205] [2022-07-22 11:05:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:26,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:05:26,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:26,948 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:05:26,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 11:05:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 11:05:27,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 11:05:27,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 11:05:27,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538414205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:27,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:05:27,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-22 11:05:27,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766312353] [2022-07-22 11:05:27,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:27,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 11:05:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:27,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 11:05:27,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:05:27,236 INFO L87 Difference]: Start difference. First operand 612 states and 824 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 16 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:28,118 INFO L93 Difference]: Finished difference Result 1344 states and 1916 transitions. [2022-07-22 11:05:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 11:05:28,118 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 16 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 60 [2022-07-22 11:05:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:28,121 INFO L225 Difference]: With dead ends: 1344 [2022-07-22 11:05:28,121 INFO L226 Difference]: Without dead ends: 970 [2022-07-22 11:05:28,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 11:05:28,123 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 542 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:28,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 423 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:05:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-07-22 11:05:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 700. [2022-07-22 11:05:28,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 603 states have (on average 1.1956882255389718) internal successors, (721), 629 states have internal predecessors, (721), 56 states have call successors, (56), 13 states have call predecessors, (56), 40 states have return successors, (147), 57 states have call predecessors, (147), 53 states have call successors, (147) [2022-07-22 11:05:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 924 transitions. [2022-07-22 11:05:28,218 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 924 transitions. Word has length 60 [2022-07-22 11:05:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:28,218 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 924 transitions. [2022-07-22 11:05:28,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 16 states have internal predecessors, (70), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 924 transitions. [2022-07-22 11:05:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:05:28,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:28,220 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:28,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 11:05:28,448 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -155190960, now seen corresponding path program 1 times [2022-07-22 11:05:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141591091] [2022-07-22 11:05:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:28,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:28,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:05:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:05:28,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:28,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141591091] [2022-07-22 11:05:28,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141591091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:28,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:28,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-22 11:05:28,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621892036] [2022-07-22 11:05:28,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:28,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 11:05:28,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 11:05:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:05:28,532 INFO L87 Difference]: Start difference. First operand 700 states and 924 transitions. Second operand has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:29,538 INFO L93 Difference]: Finished difference Result 1626 states and 2413 transitions. [2022-07-22 11:05:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 11:05:29,538 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-07-22 11:05:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:29,542 INFO L225 Difference]: With dead ends: 1626 [2022-07-22 11:05:29,542 INFO L226 Difference]: Without dead ends: 1446 [2022-07-22 11:05:29,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:05:29,544 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 340 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:29,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 799 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:05:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-07-22 11:05:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 891. [2022-07-22 11:05:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 774 states have (on average 1.198966408268734) internal successors, (928), 807 states have internal predecessors, (928), 66 states have call successors, (66), 16 states have call predecessors, (66), 50 states have return successors, (172), 67 states have call predecessors, (172), 63 states have call successors, (172) [2022-07-22 11:05:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1166 transitions. [2022-07-22 11:05:29,655 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1166 transitions. Word has length 60 [2022-07-22 11:05:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:29,655 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1166 transitions. [2022-07-22 11:05:29,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.090909090909091) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1166 transitions. [2022-07-22 11:05:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:05:29,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:29,657 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:29,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 11:05:29,657 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash -833017452, now seen corresponding path program 1 times [2022-07-22 11:05:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:29,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130723988] [2022-07-22 11:05:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:29,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:29,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:29,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:05:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:05:29,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:29,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130723988] [2022-07-22 11:05:29,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130723988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:29,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:29,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 11:05:29,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170012802] [2022-07-22 11:05:29,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:29,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:29,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:29,722 INFO L87 Difference]: Start difference. First operand 891 states and 1166 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:30,377 INFO L93 Difference]: Finished difference Result 1902 states and 2781 transitions. [2022-07-22 11:05:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 11:05:30,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-07-22 11:05:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:30,382 INFO L225 Difference]: With dead ends: 1902 [2022-07-22 11:05:30,382 INFO L226 Difference]: Without dead ends: 1585 [2022-07-22 11:05:30,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-07-22 11:05:30,384 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 735 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:30,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 519 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:05:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-07-22 11:05:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 998. [2022-07-22 11:05:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 865 states have (on average 1.1965317919075145) internal successors, (1035), 904 states have internal predecessors, (1035), 74 states have call successors, (74), 18 states have call predecessors, (74), 58 states have return successors, (192), 75 states have call predecessors, (192), 71 states have call successors, (192) [2022-07-22 11:05:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1301 transitions. [2022-07-22 11:05:30,523 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1301 transitions. Word has length 60 [2022-07-22 11:05:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:30,523 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 1301 transitions. [2022-07-22 11:05:30,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1301 transitions. [2022-07-22 11:05:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 11:05:30,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:30,525 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:30,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 11:05:30,525 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -289204466, now seen corresponding path program 2 times [2022-07-22 11:05:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:30,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839752450] [2022-07-22 11:05:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:30,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:30,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:05:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:30,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:05:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:30,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 11:05:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:05:30,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:05:30,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839752450] [2022-07-22 11:05:30,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839752450] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:30,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:30,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 11:05:30,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157251512] [2022-07-22 11:05:30,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:30,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:30,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:05:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:30,611 INFO L87 Difference]: Start difference. First operand 998 states and 1301 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:31,117 INFO L93 Difference]: Finished difference Result 1370 states and 1883 transitions. [2022-07-22 11:05:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 11:05:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 60 [2022-07-22 11:05:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:31,120 INFO L225 Difference]: With dead ends: 1370 [2022-07-22 11:05:31,120 INFO L226 Difference]: Without dead ends: 1145 [2022-07-22 11:05:31,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:05:31,122 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 208 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:31,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 594 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:05:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-22 11:05:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 907. [2022-07-22 11:05:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 783 states have (on average 1.1915708812260537) internal successors, (933), 818 states have internal predecessors, (933), 69 states have call successors, (69), 18 states have call predecessors, (69), 54 states have return successors, (178), 70 states have call predecessors, (178), 66 states have call successors, (178) [2022-07-22 11:05:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1180 transitions. [2022-07-22 11:05:31,251 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1180 transitions. Word has length 60 [2022-07-22 11:05:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:31,252 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 1180 transitions. [2022-07-22 11:05:31,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1180 transitions. [2022-07-22 11:05:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 11:05:31,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:31,254 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:31,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 11:05:31,254 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 814388103, now seen corresponding path program 1 times [2022-07-22 11:05:31,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:05:31,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797361134] [2022-07-22 11:05:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:31,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:05:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:05:31,273 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 11:05:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 11:05:31,307 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 11:05:31,307 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 11:05:31,308 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 11:05:31,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-22 11:05:31,312 INFO L356 BasicCegarLoop]: Path program 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] [2022-07-22 11:05:31,315 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 11:05:31,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 11:05:31 BoogieIcfgContainer [2022-07-22 11:05:31,391 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 11:05:31,391 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 11:05:31,392 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 11:05:31,392 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 11:05:31,392 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:34" (3/4) ... [2022-07-22 11:05:31,396 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 11:05:31,397 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 11:05:31,397 INFO L158 Benchmark]: Toolchain (without parser) took 58056.44ms. Allocated memory was 119.5MB in the beginning and 209.7MB in the end (delta: 90.2MB). Free memory was 85.0MB in the beginning and 140.6MB in the end (delta: -55.6MB). Peak memory consumption was 35.0MB. Max. memory is 16.1GB. [2022-07-22 11:05:31,397 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 119.5MB. Free memory was 92.2MB in the beginning and 92.2MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:05:31,399 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.17ms. Allocated memory is still 119.5MB. Free memory was 84.8MB in the beginning and 92.0MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 11:05:31,401 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.75ms. Allocated memory is still 119.5MB. Free memory was 92.0MB in the beginning and 90.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 11:05:31,401 INFO L158 Benchmark]: Boogie Preprocessor took 26.01ms. Allocated memory is still 119.5MB. Free memory was 89.9MB in the beginning and 88.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 11:05:31,404 INFO L158 Benchmark]: RCFGBuilder took 392.10ms. Allocated memory is still 119.5MB. Free memory was 88.5MB in the beginning and 71.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-07-22 11:05:31,405 INFO L158 Benchmark]: TraceAbstraction took 57321.78ms. Allocated memory was 119.5MB in the beginning and 209.7MB in the end (delta: 90.2MB). Free memory was 71.0MB in the beginning and 140.6MB in the end (delta: -69.6MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. [2022-07-22 11:05:31,406 INFO L158 Benchmark]: Witness Printer took 5.15ms. Allocated memory is still 209.7MB. Free memory is still 140.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 11:05:31,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 119.5MB. Free memory was 92.2MB in the beginning and 92.2MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.17ms. Allocated memory is still 119.5MB. Free memory was 84.8MB in the beginning and 92.0MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.75ms. Allocated memory is still 119.5MB. Free memory was 92.0MB in the beginning and 90.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.01ms. Allocated memory is still 119.5MB. Free memory was 89.9MB in the beginning and 88.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 392.10ms. Allocated memory is still 119.5MB. Free memory was 88.5MB in the beginning and 71.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 57321.78ms. Allocated memory was 119.5MB in the beginning and 209.7MB in the end (delta: 90.2MB). Free memory was 71.0MB in the beginning and 140.6MB in the end (delta: -69.6MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. * Witness Printer took 5.15ms. Allocated memory is still 209.7MB. Free memory is still 140.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=127, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=0, m=0, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L81] return (__retres4); VAL [\old(e)=0, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=0, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, \result=0, __retres4=0, e=0, m=0, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L242] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=127, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=16777216, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L77] m = m & ~ (1U << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=0, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=8573157382] [L78] res = m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, e=127, m=0, m = m & ~ (1U << 24U)=8573157380, res=4278190080, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L79] __retres4 = res VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, __retres4=4278190080, e=127, m=0, m = m & ~ (1U << 24U)=8573157380, res=4278190080, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L81] return (__retres4); VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=16777216, \old(res = m | ((unsigned int )(e + 128) << 24U))=8573157382, \result=8573157376, __retres4=4278190080, e=127, m=0, m = m & ~ (1U << 24U)=8573157380, res=4278190080, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L243] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=8573157376, ea=127, eb=127, m = m & ~ (1U << 24U)=8573157380, ma=16777216, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L60] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L65] COND TRUE e >= 127 [L66] __retres4 = 4294967295U VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, __retres4=4294967295, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L81] return (__retres4); VAL [\old(e)=127, \old(m = m & ~ (1U << 24U))=8573157380, \old(m)=33554432, \old(res = m | ((unsigned int )(e + 128) << 24U))=4278190080, \result=4294967295, __retres4=4294967295, e=127, m=33554432, m = m & ~ (1U << 24U)=8573157380, res = m | ((unsigned int )(e + 128) << 24U)=4278190080] [L244] RET, EXPR base2flt(mb, eb) VAL [a=4278190080, base2flt(mb, eb)=4294967295, ea=127, eb=127, m = m & ~ (1U << 24U)=8573157380, ma=16777216, mb=33554432, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=8573157385, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4278190080, b=4294967295, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=8573157385, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] [L95] COND TRUE a < b [L96] tmp = a [L97] a = b [L98] b = tmp VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=8573157385, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L102] COND FALSE !(! b) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=8573157385, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L109] ma = a & ((1U << 24U) - 1U) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, m = m & ~ (1U << 24U)=8573157380, ma=4294967295, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L110] ea = (int )(a >> 24U) - 128 VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, m = m & ~ (1U << 24U)=8573157380, ma=4294967295, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L111] ma = ma | (1U << 24U) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, m = m & ~ (1U << 24U)=8573157380, ma=4278190083, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=8573157378, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L112] mb = b & ((1U << 24U) - 1U) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, m = m & ~ (1U << 24U)=8573157380, ma=4278190083, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb=4294967295, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L113] eb = (int )(b >> 24U) - 128 VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, eb=383, m = m & ~ (1U << 24U)=8573157380, ma=4278190083, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb=4294967295, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L114] mb = mb | (1U << 24U) VAL [\old(a)=4278190080, \old(b)=4294967295, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, a=4294967295, b=4278190080, ea=127, eb=383, m = m & ~ (1U << 24U)=8573157380, ma=4278190083, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb=4278190090, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384, tmp=4278190080] [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] [L17] COND TRUE !(cond) VAL [\old(cond)=0, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, cond=0, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] [L18] reach_error() VAL [\old(cond)=0, \old(ma = a & ((1U << 24U) - 1U))=8573157385, \old(ma = ma & ((1U << 24U) - 1U))=8573157383, \old(ma = ma | (1U << 24U))=8573157381, \old(mb = b & ((1U << 24U) - 1U))=8573157378, \old(mb = mb | (1U << 24U))=8573157377, \old(res = ma | ((unsigned int )(ea + 128) << 24U))=8573157384, cond=0, m = m & ~ (1U << 24U)=8573157380, ma = a & ((1U << 24U) - 1U)=16777215, ma = ma & ((1U << 24U) - 1U)=8573157383, ma = ma | (1U << 24U)=8573157381, mb = b & ((1U << 24U) - 1U)=16777215, mb = mb | (1U << 24U)=8573157377, res = m | ((unsigned int )(e + 128) << 24U)=4278190080, res = ma | ((unsigned int )(ea + 128) << 24U)=8573157384] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 88 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 57.2s, OverallIterations: 33, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 41.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13522 SdHoareTripleChecker+Valid, 28.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13246 mSDsluCounter, 17715 SdHoareTripleChecker+Invalid, 23.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11990 mSDsCounter, 1950 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 66817 IncrementalHoareTripleChecker+Invalid, 68767 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1950 mSolverCounterUnsat, 5725 mSDtfsCounter, 66817 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2827 GetRequests, 1899 SyntacticMatches, 17 SemanticMatches, 911 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6960 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=998occurred in iteration=31, InterpolantAutomatonStates: 653, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 32 MinimizatonAttempts, 5833 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 2748 NumberOfCodeBlocks, 2748 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 3378 ConstructedInterpolants, 0 QuantifiedInterpolants, 8805 SizeOfPredicates, 95 NumberOfNonLiveVariables, 3982 ConjunctsInSsa, 292 ConjunctsInUnsatCore, 64 InterpolantComputations, 19 PerfectInterpolantSequences, 1053/1266 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-22 11:05:31,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:05:33,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:05:33,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:05:33,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:05:33,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:05:33,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:05:33,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:05:33,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:05:33,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:05:33,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:05:33,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:05:33,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:05:33,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:05:33,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:05:33,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:05:33,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:05:33,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:05:33,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:05:33,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:05:33,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:05:33,317 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:05:33,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:05:33,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:05:33,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:05:33,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:05:33,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:05:33,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:05:33,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:05:33,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:05:33,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:05:33,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:05:33,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:05:33,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:05:33,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:05:33,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:05:33,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:05:33,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:05:33,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:05:33,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:05:33,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:05:33,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:05:33,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:05:33,332 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-22 11:05:33,353 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:05:33,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:05:33,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:05:33,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:05:33,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:05:33,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:05:33,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:05:33,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:05:33,356 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:05:33,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:05:33,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:05:33,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:05:33,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:05:33,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:05:33,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:05:33,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:05:33,358 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-22 11:05:33,358 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-22 11:05:33,358 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-22 11:05:33,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:05:33,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:05:33,359 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:05:33,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:05:33,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:05:33,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:05:33,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:05:33,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:05:33,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:05:33,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:05:33,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:05:33,361 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-22 11:05:33,361 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-22 11:05:33,361 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:05:33,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:05:33,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:05:33,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-22 11:05:33,362 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-07-22 11:05:33,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:05:33,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:05:33,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:05:33,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:05:33,676 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:05:33,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-07-22 11:05:33,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5d6fdad/b9644176e2534882b335f1ad3636914a/FLAGb34304974 [2022-07-22 11:05:34,190 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:05:34,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-07-22 11:05:34,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5d6fdad/b9644176e2534882b335f1ad3636914a/FLAGb34304974 [2022-07-22 11:05:34,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a5d6fdad/b9644176e2534882b335f1ad3636914a [2022-07-22 11:05:34,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:05:34,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:05:34,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:05:34,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:05:34,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:05:34,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e08626e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34, skipping insertion in model container [2022-07-22 11:05:34,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:05:34,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:05:34,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-07-22 11:05:34,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:05:34,474 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:05:34,482 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-07-22 11:05:34,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:05:34,512 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:05:34,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34 WrapperNode [2022-07-22 11:05:34,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:05:34,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:05:34,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:05:34,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:05:34,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,540 INFO L137 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-07-22 11:05:34,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:05:34,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:05:34,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:05:34,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:05:34,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:05:34,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:05:34,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:05:34,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:05:34,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (1/1) ... [2022-07-22 11:05:34,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:05:34,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:05:34,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 11:05:34,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 11:05:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:05:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-22 11:05:34,640 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 11:05:34,640 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 11:05:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:05:34,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:05:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-07-22 11:05:34,641 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-07-22 11:05:34,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 11:05:34,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 11:05:34,730 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:05:34,745 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:05:35,017 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:05:35,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:05:35,028 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 11:05:35,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:05:35 BoogieIcfgContainer [2022-07-22 11:05:35,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:05:35,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:05:35,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:05:35,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:05:35,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:05:34" (1/3) ... [2022-07-22 11:05:35,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ef9c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:05:35, skipping insertion in model container [2022-07-22 11:05:35,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:05:34" (2/3) ... [2022-07-22 11:05:35,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ef9c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:05:35, skipping insertion in model container [2022-07-22 11:05:35,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:05:35" (3/3) ... [2022-07-22 11:05:35,042 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-07-22 11:05:35,054 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:05:35,054 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:05:35,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:05:35,129 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6652d9b4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d20a69f [2022-07-22 11:05:35,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:05:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 11:05:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 11:05:35,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:35,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:35,144 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:35,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2022-07-22 11:05:35,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:35,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130386092] [2022-07-22 11:05:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:35,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:35,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:35,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-22 11:05:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 11:05:35,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:35,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:35,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:35,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130386092] [2022-07-22 11:05:35,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130386092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:35,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:35,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:05:35,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614853491] [2022-07-22 11:05:35,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:35,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:05:35,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:05:35,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:05:35,475 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:35,597 INFO L93 Difference]: Finished difference Result 130 states and 195 transitions. [2022-07-22 11:05:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:05:35,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-07-22 11:05:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:35,607 INFO L225 Difference]: With dead ends: 130 [2022-07-22 11:05:35,608 INFO L226 Difference]: Without dead ends: 71 [2022-07-22 11:05:35,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:05:35,614 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 23 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:35,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 452 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:05:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-22 11:05:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-07-22 11:05:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-22 11:05:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2022-07-22 11:05:35,651 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 31 [2022-07-22 11:05:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:35,652 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2022-07-22 11:05:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2022-07-22 11:05:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 11:05:35,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:35,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:05:35,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:35,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:35,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:35,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1468368814, now seen corresponding path program 1 times [2022-07-22 11:05:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:35,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34906027] [2022-07-22 11:05:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:35,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:35,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:35,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:35,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-22 11:05:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:05:35,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:36,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:36,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:36,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34906027] [2022-07-22 11:05:36,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34906027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:36,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:36,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2022-07-22 11:05:36,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33140503] [2022-07-22 11:05:36,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:05:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:05:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:05:36,063 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:05:36,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:36,214 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-07-22 11:05:36,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:05:36,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-07-22 11:05:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:36,219 INFO L225 Difference]: With dead ends: 121 [2022-07-22 11:05:36,219 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 11:05:36,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 11:05:36,224 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 26 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:36,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 484 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:05:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 11:05:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-07-22 11:05:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-07-22 11:05:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-07-22 11:05:36,247 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2022-07-22 11:05:36,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:36,248 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-07-22 11:05:36,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 11:05:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-07-22 11:05:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 11:05:36,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:36,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 11:05:36,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:36,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:36,459 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2022-07-22 11:05:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:36,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993280896] [2022-07-22 11:05:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:36,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:36,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:36,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:36,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-22 11:05:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:36,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 11:05:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:36,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 11:05:36,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:36,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993280896] [2022-07-22 11:05:36,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993280896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:36,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:36,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-22 11:05:36,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846907136] [2022-07-22 11:05:36,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:36,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:05:36,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:05:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:05:36,621 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:36,696 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-07-22 11:05:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:05:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-07-22 11:05:36,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:36,698 INFO L225 Difference]: With dead ends: 113 [2022-07-22 11:05:36,698 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 11:05:36,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:05:36,699 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:36,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 455 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:05:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 11:05:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-07-22 11:05:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.25) internal successors, (75), 62 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-22 11:05:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-07-22 11:05:36,708 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 39 [2022-07-22 11:05:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:36,709 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-07-22 11:05:36,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-07-22 11:05:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 11:05:36,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:36,711 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:36,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:36,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:36,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2022-07-22 11:05:36,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:36,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524280061] [2022-07-22 11:05:36,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:05:36,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:36,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:36,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-22 11:05:36,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 11:05:36,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:05:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:05:36,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:05:37,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:37,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524280061] [2022-07-22 11:05:37,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524280061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:37,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:37,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:05:37,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279835548] [2022-07-22 11:05:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:37,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:05:37,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:05:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:05:37,070 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:37,122 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-07-22 11:05:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:05:37,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-22 11:05:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:37,124 INFO L225 Difference]: With dead ends: 96 [2022-07-22 11:05:37,124 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 11:05:37,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:05:37,126 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 9 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:37,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 333 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-07-22 11:05:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 11:05:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-07-22 11:05:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.25) internal successors, (80), 67 states have internal predecessors, (80), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2022-07-22 11:05:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-07-22 11:05:37,136 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 39 [2022-07-22 11:05:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:37,138 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-07-22 11:05:37,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-07-22 11:05:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 11:05:37,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:37,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:37,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:37,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:37,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:37,352 INFO L85 PathProgramCache]: Analyzing trace with hash 518419771, now seen corresponding path program 1 times [2022-07-22 11:05:37,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:37,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148828555] [2022-07-22 11:05:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:37,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:37,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:37,354 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:37,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-22 11:05:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:37,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 11:05:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:05:37,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:37,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:37,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148828555] [2022-07-22 11:05:37,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148828555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:37,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:37,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:05:37,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81788243] [2022-07-22 11:05:37,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:37,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:05:37,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:37,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:05:37,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:05:37,463 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:37,523 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2022-07-22 11:05:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:05:37,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-22 11:05:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:37,525 INFO L225 Difference]: With dead ends: 96 [2022-07-22 11:05:37,525 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 11:05:37,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:05:37,527 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 9 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:37,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 304 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-07-22 11:05:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 11:05:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-07-22 11:05:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 65 states have internal predecessors, (78), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-07-22 11:05:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-07-22 11:05:37,536 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 39 [2022-07-22 11:05:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:37,536 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-07-22 11:05:37,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 11:05:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-07-22 11:05:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:05:37,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:37,538 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 11:05:37,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-07-22 11:05:37,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:37,747 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:37,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2022-07-22 11:05:37,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:37,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669886960] [2022-07-22 11:05:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:37,748 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:37,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:37,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:37,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-22 11:05:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 11:05:37,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:05:37,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:37,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:37,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669886960] [2022-07-22 11:05:37,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669886960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:37,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:37,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 11:05:37,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087895439] [2022-07-22 11:05:37,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:37,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:37,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:37,902 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:05:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:38,119 INFO L93 Difference]: Finished difference Result 126 states and 163 transitions. [2022-07-22 11:05:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:05:38,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-07-22 11:05:38,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:38,121 INFO L225 Difference]: With dead ends: 126 [2022-07-22 11:05:38,121 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 11:05:38,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:05:38,122 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 34 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:38,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 651 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:05:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 11:05:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2022-07-22 11:05:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 76 states have internal predecessors, (91), 16 states have call successors, (16), 7 states have call predecessors, (16), 9 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2022-07-22 11:05:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2022-07-22 11:05:38,132 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 44 [2022-07-22 11:05:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:38,133 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2022-07-22 11:05:38,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:05:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2022-07-22 11:05:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:05:38,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:38,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 11:05:38,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:38,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:38,343 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2022-07-22 11:05:38,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:38,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869942193] [2022-07-22 11:05:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:38,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:38,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:38,346 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:38,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-22 11:05:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 11:05:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:05:38,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:05:38,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:38,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869942193] [2022-07-22 11:05:38,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869942193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:38,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:38,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2022-07-22 11:05:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347327873] [2022-07-22 11:05:38,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:38,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 11:05:38,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:38,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 11:05:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:05:38,658 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:38,899 INFO L93 Difference]: Finished difference Result 133 states and 171 transitions. [2022-07-22 11:05:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:05:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-07-22 11:05:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:38,901 INFO L225 Difference]: With dead ends: 133 [2022-07-22 11:05:38,901 INFO L226 Difference]: Without dead ends: 125 [2022-07-22 11:05:38,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:05:38,902 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 50 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:38,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 692 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:05:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-22 11:05:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2022-07-22 11:05:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (24), 19 states have call predecessors, (24), 16 states have call successors, (24) [2022-07-22 11:05:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 142 transitions. [2022-07-22 11:05:38,914 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 142 transitions. Word has length 46 [2022-07-22 11:05:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:38,914 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 142 transitions. [2022-07-22 11:05:38,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:38,914 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 142 transitions. [2022-07-22 11:05:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-22 11:05:38,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:38,917 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-22 11:05:38,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:39,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:39,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2022-07-22 11:05:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:39,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263453741] [2022-07-22 11:05:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:39,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:39,120 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:39,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-22 11:05:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:39,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:05:39,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 11:05:39,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:39,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:39,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263453741] [2022-07-22 11:05:39,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263453741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:39,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:39,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 11:05:39,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739646474] [2022-07-22 11:05:39,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:39,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 11:05:39,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 11:05:39,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:05:39,204 INFO L87 Difference]: Start difference. First operand 111 states and 142 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 11:05:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:39,247 INFO L93 Difference]: Finished difference Result 119 states and 149 transitions. [2022-07-22 11:05:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 11:05:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-07-22 11:05:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:39,250 INFO L225 Difference]: With dead ends: 119 [2022-07-22 11:05:39,250 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 11:05:39,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:05:39,254 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:39,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 309 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:05:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 11:05:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-22 11:05:39,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.205128205128205) internal successors, (94), 80 states have internal predecessors, (94), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 16 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-22 11:05:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2022-07-22 11:05:39,278 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 46 [2022-07-22 11:05:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:39,279 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2022-07-22 11:05:39,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-22 11:05:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2022-07-22 11:05:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:05:39,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:39,280 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:39,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:39,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:39,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2022-07-22 11:05:39,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:39,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397330845] [2022-07-22 11:05:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:39,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:39,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:39,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:39,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-22 11:05:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:39,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 11:05:39,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:05:39,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:05:40,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:40,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397330845] [2022-07-22 11:05:40,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397330845] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:40,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:40,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-22 11:05:40,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22505101] [2022-07-22 11:05:40,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:40,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 11:05:40,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:40,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 11:05:40,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:05:40,030 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 11:05:40,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:40,924 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2022-07-22 11:05:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 11:05:40,925 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-07-22 11:05:40,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:40,926 INFO L225 Difference]: With dead ends: 151 [2022-07-22 11:05:40,926 INFO L226 Difference]: Without dead ends: 114 [2022-07-22 11:05:40,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 11:05:40,928 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 99 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:40,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1232 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:05:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-22 11:05:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2022-07-22 11:05:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.234375) internal successors, (79), 68 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (24), 12 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-22 11:05:40,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 115 transitions. [2022-07-22 11:05:40,936 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 115 transitions. Word has length 48 [2022-07-22 11:05:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:40,936 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 115 transitions. [2022-07-22 11:05:40,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 11:05:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 115 transitions. [2022-07-22 11:05:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 11:05:40,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:40,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:40,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:41,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:41,146 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:41,147 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2022-07-22 11:05:41,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:41,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405763693] [2022-07-22 11:05:41,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:05:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:41,148 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:41,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-22 11:05:41,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:05:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:05:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 11:05:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:05:41,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:05:41,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405763693] [2022-07-22 11:05:41,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405763693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:41,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:41,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-22 11:05:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879232924] [2022-07-22 11:05:41,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:41,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 11:05:41,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 11:05:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-07-22 11:05:41,641 INFO L87 Difference]: Start difference. First operand 86 states and 115 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 11:05:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:42,536 INFO L93 Difference]: Finished difference Result 126 states and 173 transitions. [2022-07-22 11:05:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 11:05:42,537 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-07-22 11:05:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:42,538 INFO L225 Difference]: With dead ends: 126 [2022-07-22 11:05:42,538 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 11:05:42,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 11:05:42,539 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 123 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:42,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1023 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 11:05:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 11:05:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 88. [2022-07-22 11:05:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 69 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (27), 13 states have call predecessors, (27), 12 states have call successors, (27) [2022-07-22 11:05:42,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 120 transitions. [2022-07-22 11:05:42,546 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 120 transitions. Word has length 48 [2022-07-22 11:05:42,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:42,546 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 120 transitions. [2022-07-22 11:05:42,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 11:05:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 120 transitions. [2022-07-22 11:05:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 11:05:42,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:42,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:42,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:42,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:42,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:42,760 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2022-07-22 11:05:42,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:42,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858847776] [2022-07-22 11:05:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:42,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:42,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-22 11:05:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:05:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:05:42,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:42,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:42,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858847776] [2022-07-22 11:05:42,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858847776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:42,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:42,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:05:42,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702037064] [2022-07-22 11:05:42,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:42,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:05:42,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:05:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:05:42,960 INFO L87 Difference]: Start difference. First operand 88 states and 120 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:42,980 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-07-22 11:05:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:05:42,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-22 11:05:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:42,982 INFO L225 Difference]: With dead ends: 95 [2022-07-22 11:05:42,982 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 11:05:42,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:05:42,983 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 9 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:42,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 284 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-07-22 11:05:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 11:05:42,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-07-22 11:05:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 73 states have internal predecessors, (83), 14 states have call successors, (14), 6 states have call predecessors, (14), 10 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2022-07-22 11:05:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2022-07-22 11:05:42,991 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 49 [2022-07-22 11:05:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:42,991 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2022-07-22 11:05:42,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2022-07-22 11:05:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:05:42,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:42,993 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:43,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:43,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:43,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:43,202 INFO L85 PathProgramCache]: Analyzing trace with hash -325172767, now seen corresponding path program 1 times [2022-07-22 11:05:43,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:43,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421388401] [2022-07-22 11:05:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:43,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:43,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:43,203 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:43,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-22 11:05:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:05:43,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:05:43,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 11:05:43,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:43,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421388401] [2022-07-22 11:05:43,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421388401] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:43,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:43,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-07-22 11:05:43,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836424113] [2022-07-22 11:05:43,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 11:05:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 11:05:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:05:43,515 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 11:05:43,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:43,809 INFO L93 Difference]: Finished difference Result 129 states and 179 transitions. [2022-07-22 11:05:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 11:05:43,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2022-07-22 11:05:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:43,811 INFO L225 Difference]: With dead ends: 129 [2022-07-22 11:05:43,811 INFO L226 Difference]: Without dead ends: 118 [2022-07-22 11:05:43,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:05:43,812 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 60 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:43,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 846 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:05:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-22 11:05:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2022-07-22 11:05:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2022-07-22 11:05:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-07-22 11:05:43,824 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 50 [2022-07-22 11:05:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:43,825 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-07-22 11:05:43,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 11:05:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-07-22 11:05:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 11:05:43,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:43,826 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:43,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:44,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:44,035 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1583051783, now seen corresponding path program 1 times [2022-07-22 11:05:44,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:44,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064710295] [2022-07-22 11:05:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:44,036 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:44,037 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:44,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-22 11:05:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:44,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:05:44,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 11:05:44,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:44,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:44,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064710295] [2022-07-22 11:05:44,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064710295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:44,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:44,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:05:44,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666098993] [2022-07-22 11:05:44,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:44,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:05:44,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:05:44,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:05:44,142 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:05:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:44,230 INFO L93 Difference]: Finished difference Result 159 states and 202 transitions. [2022-07-22 11:05:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:05:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2022-07-22 11:05:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:44,231 INFO L225 Difference]: With dead ends: 159 [2022-07-22 11:05:44,231 INFO L226 Difference]: Without dead ends: 91 [2022-07-22 11:05:44,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-22 11:05:44,232 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 13 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:44,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 501 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:05:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-22 11:05:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-07-22 11:05:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.234375) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-22 11:05:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-07-22 11:05:44,240 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 54 [2022-07-22 11:05:44,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:44,240 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-07-22 11:05:44,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 7 states have internal predecessors, (37), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 11:05:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-07-22 11:05:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 11:05:44,241 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:44,241 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-22 11:05:44,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-22 11:05:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:44,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2022-07-22 11:05:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:44,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611011676] [2022-07-22 11:05:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:44,453 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:44,454 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:44,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-22 11:05:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:05:44,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:05:46,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:46,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:46,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611011676] [2022-07-22 11:05:46,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611011676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:46,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:46,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:05:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627269549] [2022-07-22 11:05:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:46,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:05:46,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:05:46,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:05:46,067 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:46,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:46,088 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2022-07-22 11:05:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:05:46,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-22 11:05:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:46,089 INFO L225 Difference]: With dead ends: 94 [2022-07-22 11:05:46,089 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 11:05:46,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:05:46,090 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 14 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:46,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 300 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-22 11:05:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 11:05:46,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-07-22 11:05:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-22 11:05:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2022-07-22 11:05:46,097 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 50 [2022-07-22 11:05:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:46,097 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2022-07-22 11:05:46,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:05:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2022-07-22 11:05:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 11:05:46,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:46,098 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-22 11:05:46,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:46,299 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2022-07-22 11:05:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:46,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106635855] [2022-07-22 11:05:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:46,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:46,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:46,301 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:46,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-22 11:05:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:46,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:05:46,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:05:46,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:05:46,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:46,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106635855] [2022-07-22 11:05:46,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106635855] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:46,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:46,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 11:05:46,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550661178] [2022-07-22 11:05:46,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:46,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:46,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:46,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:46,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:46,511 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:05:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:46,662 INFO L93 Difference]: Finished difference Result 111 states and 163 transitions. [2022-07-22 11:05:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:05:46,662 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-07-22 11:05:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:46,663 INFO L225 Difference]: With dead ends: 111 [2022-07-22 11:05:46,663 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 11:05:46,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:05:46,664 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 119 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:46,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 481 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:05:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 11:05:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2022-07-22 11:05:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (31), 12 states have call predecessors, (31), 11 states have call successors, (31) [2022-07-22 11:05:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-07-22 11:05:46,675 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 54 [2022-07-22 11:05:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:46,675 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-07-22 11:05:46,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 11:05:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-07-22 11:05:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 11:05:46,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:46,678 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:05:46,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:46,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:46,878 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 1 times [2022-07-22 11:05:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:46,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246477242] [2022-07-22 11:05:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:46,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:46,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:46,880 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:46,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-22 11:05:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:05:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:05:46,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:05:47,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:47,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246477242] [2022-07-22 11:05:47,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246477242] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:47,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:47,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 11:05:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893931531] [2022-07-22 11:05:47,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:47,114 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:47,278 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2022-07-22 11:05:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:05:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-07-22 11:05:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:47,280 INFO L225 Difference]: With dead ends: 111 [2022-07-22 11:05:47,280 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 11:05:47,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:05:47,281 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 108 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:47,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 495 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:05:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 11:05:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2022-07-22 11:05:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 70 states have internal predecessors, (79), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2022-07-22 11:05:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-07-22 11:05:47,288 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 63 [2022-07-22 11:05:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:47,288 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-07-22 11:05:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-07-22 11:05:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 11:05:47,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:47,289 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-22 11:05:47,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:47,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:47,499 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash -378794195, now seen corresponding path program 1 times [2022-07-22 11:05:47,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:47,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422108139] [2022-07-22 11:05:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:47,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:47,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:47,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-22 11:05:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:47,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:05:47,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:05:47,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:05:47,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:47,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422108139] [2022-07-22 11:05:47,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422108139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:47,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:47,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 11:05:47,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15915755] [2022-07-22 11:05:47,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:47,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:47,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:47,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:47,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:47,719 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:47,866 INFO L93 Difference]: Finished difference Result 109 states and 153 transitions. [2022-07-22 11:05:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:05:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-07-22 11:05:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:47,868 INFO L225 Difference]: With dead ends: 109 [2022-07-22 11:05:47,868 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 11:05:47,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:05:47,869 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 101 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:47,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 565 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:05:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 11:05:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-07-22 11:05:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 67 states have internal predecessors, (76), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (27), 12 states have call predecessors, (27), 11 states have call successors, (27) [2022-07-22 11:05:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2022-07-22 11:05:47,876 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 63 [2022-07-22 11:05:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:47,876 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2022-07-22 11:05:47,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2022-07-22 11:05:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-22 11:05:47,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:47,878 INFO L195 NwaCegarLoop]: 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] [2022-07-22 11:05:47,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:48,084 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2022-07-22 11:05:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:48,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558654652] [2022-07-22 11:05:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:48,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:48,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:48,086 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:48,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-22 11:05:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:48,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:05:48,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:05:48,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 11:05:48,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:48,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558654652] [2022-07-22 11:05:48,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558654652] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:48,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:48,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 11:05:48,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712294853] [2022-07-22 11:05:48,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:48,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:05:48,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:48,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:05:48,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:05:48,321 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:48,460 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2022-07-22 11:05:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:05:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-07-22 11:05:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:48,461 INFO L225 Difference]: With dead ends: 106 [2022-07-22 11:05:48,461 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 11:05:48,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:05:48,462 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 104 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:48,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 522 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:05:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 11:05:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 82. [2022-07-22 11:05:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (25), 12 states have call predecessors, (25), 11 states have call successors, (25) [2022-07-22 11:05:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2022-07-22 11:05:48,469 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 65 [2022-07-22 11:05:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:48,469 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2022-07-22 11:05:48,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2022-07-22 11:05:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 11:05:48,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:48,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:05:48,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:48,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:48,680 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1951422266, now seen corresponding path program 1 times [2022-07-22 11:05:48,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:48,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053983546] [2022-07-22 11:05:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:48,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:48,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:48,682 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:48,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-22 11:05:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:48,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 11:05:48,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 11:05:49,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:49,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:49,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053983546] [2022-07-22 11:05:49,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053983546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:49,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:49,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 11:05:49,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113934086] [2022-07-22 11:05:49,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:49,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:05:49,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:05:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:05:49,082 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:49,467 INFO L93 Difference]: Finished difference Result 108 states and 148 transitions. [2022-07-22 11:05:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:05:49,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 72 [2022-07-22 11:05:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:49,469 INFO L225 Difference]: With dead ends: 108 [2022-07-22 11:05:49,469 INFO L226 Difference]: Without dead ends: 97 [2022-07-22 11:05:49,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:05:49,470 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 47 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:49,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 508 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:05:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-22 11:05:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-07-22 11:05:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 73 states have internal predecessors, (82), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (33), 13 states have call predecessors, (33), 12 states have call successors, (33) [2022-07-22 11:05:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2022-07-22 11:05:49,478 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 72 [2022-07-22 11:05:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:49,478 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2022-07-22 11:05:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:49,479 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2022-07-22 11:05:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 11:05:49,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:49,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-22 11:05:49,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:49,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:49,689 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 1 times [2022-07-22 11:05:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353669857] [2022-07-22 11:05:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:49,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:49,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:49,692 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:49,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-22 11:05:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:49,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:05:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:05:50,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 11:05:51,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:51,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353669857] [2022-07-22 11:05:51,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353669857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:51,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:51,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-22 11:05:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6558810] [2022-07-22 11:05:51,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:51,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 11:05:51,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 11:05:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:05:51,268 INFO L87 Difference]: Start difference. First operand 92 states and 128 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 11:05:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:53,338 INFO L93 Difference]: Finished difference Result 113 states and 155 transitions. [2022-07-22 11:05:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:05:53,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 72 [2022-07-22 11:05:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:53,340 INFO L225 Difference]: With dead ends: 113 [2022-07-22 11:05:53,340 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 11:05:53,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 11:05:53,341 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 153 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:53,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 827 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 11:05:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 11:05:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2022-07-22 11:05:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.208955223880597) internal successors, (81), 72 states have internal predecessors, (81), 12 states have call successors, (12), 5 states have call predecessors, (12), 10 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-07-22 11:05:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2022-07-22 11:05:53,350 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 72 [2022-07-22 11:05:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:53,350 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2022-07-22 11:05:53,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 11:05:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2022-07-22 11:05:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 11:05:53,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:53,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-22 11:05:53,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:53,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:53,563 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 2 times [2022-07-22 11:05:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685492592] [2022-07-22 11:05:53,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:05:53,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:53,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:53,566 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:53,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-22 11:05:53,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:05:53,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:05:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:05:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:05:53,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 11:05:55,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685492592] [2022-07-22 11:05:55,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685492592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:05:55,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:05:55,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-22 11:05:55,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922405368] [2022-07-22 11:05:55,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:05:55,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 11:05:55,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:55,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 11:05:55,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:05:55,071 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 11:05:57,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:57,076 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2022-07-22 11:05:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 11:05:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 72 [2022-07-22 11:05:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:57,078 INFO L225 Difference]: With dead ends: 111 [2022-07-22 11:05:57,078 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 11:05:57,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 11:05:57,079 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 165 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:57,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 752 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:05:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 11:05:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2022-07-22 11:05:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 11 states have call successors, (11), 5 states have call predecessors, (11), 8 states have return successors, (19), 11 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-22 11:05:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2022-07-22 11:05:57,087 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 72 [2022-07-22 11:05:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:57,087 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2022-07-22 11:05:57,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 11:05:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2022-07-22 11:05:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 11:05:57,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:57,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:05:57,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:57,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:57,298 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:57,299 INFO L85 PathProgramCache]: Analyzing trace with hash 324909818, now seen corresponding path program 1 times [2022-07-22 11:05:57,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:57,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118922234] [2022-07-22 11:05:57,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:57,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:57,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:57,300 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:57,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-22 11:05:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 11:05:57,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 11:05:57,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:57,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:57,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118922234] [2022-07-22 11:05:57,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118922234] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:57,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:05:57,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:05:57,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830336748] [2022-07-22 11:05:57,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:57,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:05:57,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:05:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:05:57,647 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:58,016 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2022-07-22 11:05:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:05:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 72 [2022-07-22 11:05:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:58,018 INFO L225 Difference]: With dead ends: 99 [2022-07-22 11:05:58,018 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 11:05:58,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:05:58,019 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 28 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:58,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 437 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:05:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 11:05:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2022-07-22 11:05:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 54 states have internal predecessors, (63), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-22 11:05:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2022-07-22 11:05:58,025 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 72 [2022-07-22 11:05:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:58,025 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2022-07-22 11:05:58,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2022-07-22 11:05:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 11:05:58,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:58,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2022-07-22 11:05:58,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:58,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:58,236 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1031466431, now seen corresponding path program 1 times [2022-07-22 11:05:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:58,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507835617] [2022-07-22 11:05:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:58,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:58,237 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:58,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-22 11:05:58,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:58,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 11:05:58,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 11:05:58,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:05:59,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:05:59,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507835617] [2022-07-22 11:05:59,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507835617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:05:59,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [288334392] [2022-07-22 11:05:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:59,062 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-22 11:05:59,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-22 11:05:59,064 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-22 11:05:59,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-07-22 11:05:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:05:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:05:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 11:05:59,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:05:59,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [288334392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:05:59,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:05:59,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2022-07-22 11:05:59,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029511793] [2022-07-22 11:05:59,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:05:59,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:05:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:05:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:05:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:05:59,319 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:59,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:05:59,367 INFO L93 Difference]: Finished difference Result 110 states and 150 transitions. [2022-07-22 11:05:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:05:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 74 [2022-07-22 11:05:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:05:59,368 INFO L225 Difference]: With dead ends: 110 [2022-07-22 11:05:59,368 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 11:05:59,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:05:59,369 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 22 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:05:59,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 278 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:05:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 11:05:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-07-22 11:05:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 73 states have internal predecessors, (82), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (30), 13 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-22 11:05:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2022-07-22 11:05:59,379 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 74 [2022-07-22 11:05:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:05:59,379 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2022-07-22 11:05:59,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:05:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2022-07-22 11:05:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 11:05:59,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:05:59,381 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-22 11:05:59,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-07-22 11:05:59,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-22 11:05:59,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:05:59,783 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:05:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:05:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1250321149, now seen corresponding path program 1 times [2022-07-22 11:05:59,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:05:59,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977198905] [2022-07-22 11:05:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:05:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:05:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:05:59,785 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:05:59,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-22 11:05:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:05:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:05:59,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:06:00,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 11:06:01,161 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977198905] [2022-07-22 11:06:01,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977198905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:01,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:01,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-22 11:06:01,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815602611] [2022-07-22 11:06:01,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:01,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 11:06:01,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:01,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 11:06:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:06:01,162 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 11:06:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:03,012 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2022-07-22 11:06:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 11:06:03,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 74 [2022-07-22 11:06:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:03,014 INFO L225 Difference]: With dead ends: 113 [2022-07-22 11:06:03,014 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 11:06:03,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 11:06:03,015 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 174 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:03,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 728 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:06:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 11:06:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 84. [2022-07-22 11:06:03,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 66 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2022-07-22 11:06:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-07-22 11:06:03,023 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 74 [2022-07-22 11:06:03,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:03,024 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-07-22 11:06:03,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 11:06:03,024 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-07-22 11:06:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 11:06:03,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:03,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:06:03,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-22 11:06:03,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:03,234 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:03,235 INFO L85 PathProgramCache]: Analyzing trace with hash 359389810, now seen corresponding path program 1 times [2022-07-22 11:06:03,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:03,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898838156] [2022-07-22 11:06:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:03,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:03,236 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:03,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-22 11:06:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:03,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:06:03,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 11:06:03,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:06:03,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:03,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898838156] [2022-07-22 11:06:03,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898838156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:06:03,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:06:03,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 11:06:03,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017151909] [2022-07-22 11:06:03,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:06:03,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:06:03,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:06:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:06:03,338 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 11:06:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:03,389 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2022-07-22 11:06:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:06:03,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-07-22 11:06:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:03,391 INFO L225 Difference]: With dead ends: 103 [2022-07-22 11:06:03,391 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 11:06:03,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:06:03,392 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 7 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:03,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 337 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:06:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 11:06:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-07-22 11:06:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 70 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 9 states have return successors, (23), 13 states have call predecessors, (23), 12 states have call successors, (23) [2022-07-22 11:06:03,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2022-07-22 11:06:03,402 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 74 [2022-07-22 11:06:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:03,403 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2022-07-22 11:06:03,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 11:06:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2022-07-22 11:06:03,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 11:06:03,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:03,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-22 11:06:03,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:03,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:03,613 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:03,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 2 times [2022-07-22 11:06:03,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:03,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333053019] [2022-07-22 11:06:03,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:06:03,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:03,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:03,615 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:03,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-22 11:06:03,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:06:03,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:03,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:06:03,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:06:04,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 11:06:04,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:04,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333053019] [2022-07-22 11:06:04,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333053019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:04,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:04,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-07-22 11:06:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937752619] [2022-07-22 11:06:04,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:04,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 11:06:04,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 11:06:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:06:04,987 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 11:06:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:06,849 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2022-07-22 11:06:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:06:06,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 74 [2022-07-22 11:06:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:06,851 INFO L225 Difference]: With dead ends: 115 [2022-07-22 11:06:06,851 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 11:06:06,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 11:06:06,852 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 153 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:06,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 740 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 11:06:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 11:06:06,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2022-07-22 11:06:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (21), 13 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-22 11:06:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2022-07-22 11:06:06,862 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 74 [2022-07-22 11:06:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:06,862 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2022-07-22 11:06:06,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-22 11:06:06,863 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2022-07-22 11:06:06,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 11:06:06,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:06,864 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-07-22 11:06:06,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:07,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:07,073 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1678929915, now seen corresponding path program 1 times [2022-07-22 11:06:07,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:07,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067227536] [2022-07-22 11:06:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:07,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:07,075 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:07,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-22 11:06:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:07,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 11:06:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:06:07,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:09,499 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:09,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067227536] [2022-07-22 11:06:09,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067227536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:09,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:09,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-22 11:06:09,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152869172] [2022-07-22 11:06:09,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:09,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 11:06:09,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:09,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 11:06:09,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:06:09,501 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:14,173 INFO L93 Difference]: Finished difference Result 116 states and 152 transitions. [2022-07-22 11:06:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 11:06:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 81 [2022-07-22 11:06:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:14,175 INFO L225 Difference]: With dead ends: 116 [2022-07-22 11:06:14,175 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 11:06:14,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 11:06:14,176 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 133 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:14,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 924 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 11:06:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 11:06:14,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 98. [2022-07-22 11:06:14,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 76 states have internal predecessors, (83), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (32), 16 states have call predecessors, (32), 15 states have call successors, (32) [2022-07-22 11:06:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2022-07-22 11:06:14,196 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 81 [2022-07-22 11:06:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:14,197 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2022-07-22 11:06:14,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2022-07-22 11:06:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 11:06:14,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:14,199 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-07-22 11:06:14,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:14,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:14,408 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2063078729, now seen corresponding path program 2 times [2022-07-22 11:06:14,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:14,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424544939] [2022-07-22 11:06:14,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:06:14,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:14,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:14,411 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:14,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-22 11:06:14,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:06:14,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 11:06:14,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:06:15,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:16,797 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:16,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424544939] [2022-07-22 11:06:16,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424544939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:16,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:16,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-22 11:06:16,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054646485] [2022-07-22 11:06:16,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:16,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 11:06:16,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:16,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 11:06:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:06:16,800 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:20,811 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2022-07-22 11:06:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 11:06:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 81 [2022-07-22 11:06:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:20,813 INFO L225 Difference]: With dead ends: 118 [2022-07-22 11:06:20,813 INFO L226 Difference]: Without dead ends: 107 [2022-07-22 11:06:20,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 11:06:20,814 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 153 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:20,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 846 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 11:06:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-22 11:06:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-07-22 11:06:20,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 77 states have internal predecessors, (84), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (34), 17 states have call predecessors, (34), 16 states have call successors, (34) [2022-07-22 11:06:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2022-07-22 11:06:20,832 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 81 [2022-07-22 11:06:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:20,832 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2022-07-22 11:06:20,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2022-07-22 11:06:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 11:06:20,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:20,834 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-07-22 11:06:20,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:21,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:21,043 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1451945505, now seen corresponding path program 1 times [2022-07-22 11:06:21,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:21,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043642116] [2022-07-22 11:06:21,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:21,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:21,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:21,045 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:21,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-22 11:06:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 11:06:21,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:06:21,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:23,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:23,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043642116] [2022-07-22 11:06:23,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043642116] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:23,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:23,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-22 11:06:23,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294694724] [2022-07-22 11:06:23,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:23,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 11:06:23,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:23,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 11:06:23,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:06:23,316 INFO L87 Difference]: Start difference. First operand 100 states and 135 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:27,130 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2022-07-22 11:06:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 11:06:27,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 79 [2022-07-22 11:06:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:27,132 INFO L225 Difference]: With dead ends: 114 [2022-07-22 11:06:27,132 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 11:06:27,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 11:06:27,133 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 156 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:27,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 822 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 11:06:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 11:06:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-07-22 11:06:27,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 77 states have internal predecessors, (84), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (30), 17 states have call predecessors, (30), 16 states have call successors, (30) [2022-07-22 11:06:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2022-07-22 11:06:27,151 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 79 [2022-07-22 11:06:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:27,152 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2022-07-22 11:06:27,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2022-07-22 11:06:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 11:06:27,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:27,153 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-22 11:06:27,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:27,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:27,363 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash -476190709, now seen corresponding path program 1 times [2022-07-22 11:06:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:27,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793616490] [2022-07-22 11:06:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:27,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:27,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:27,364 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:27,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-22 11:06:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:27,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:06:27,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:27,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:27,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:27,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793616490] [2022-07-22 11:06:27,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793616490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:27,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:27,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-22 11:06:27,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014531412] [2022-07-22 11:06:27,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:27,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 11:06:27,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 11:06:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:06:27,725 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:28,054 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2022-07-22 11:06:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:06:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-07-22 11:06:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:28,055 INFO L225 Difference]: With dead ends: 109 [2022-07-22 11:06:28,055 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 11:06:28,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:06:28,056 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 112 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:28,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 689 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:06:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 11:06:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-22 11:06:28,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 76 states have internal predecessors, (83), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (28), 16 states have call predecessors, (28), 15 states have call successors, (28) [2022-07-22 11:06:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2022-07-22 11:06:28,069 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 82 [2022-07-22 11:06:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:28,069 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2022-07-22 11:06:28,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2022-07-22 11:06:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 11:06:28,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:28,071 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-07-22 11:06:28,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-22 11:06:28,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:28,280 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:28,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1133603807, now seen corresponding path program 2 times [2022-07-22 11:06:28,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:28,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286830366] [2022-07-22 11:06:28,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:06:28,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:28,282 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:28,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-22 11:06:28,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:06:28,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 11:06:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:06:28,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:30,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:30,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286830366] [2022-07-22 11:06:30,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286830366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:30,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:30,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-07-22 11:06:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156389093] [2022-07-22 11:06:30,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:30,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 11:06:30,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 11:06:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:06:30,717 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:35,149 INFO L93 Difference]: Finished difference Result 112 states and 142 transitions. [2022-07-22 11:06:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 11:06:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 79 [2022-07-22 11:06:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:35,156 INFO L225 Difference]: With dead ends: 112 [2022-07-22 11:06:35,156 INFO L226 Difference]: Without dead ends: 103 [2022-07-22 11:06:35,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 11:06:35,160 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 172 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:35,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 874 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 11:06:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-22 11:06:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2022-07-22 11:06:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 76 states have internal predecessors, (83), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (26), 16 states have call predecessors, (26), 15 states have call successors, (26) [2022-07-22 11:06:35,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 125 transitions. [2022-07-22 11:06:35,175 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 125 transitions. Word has length 79 [2022-07-22 11:06:35,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:35,175 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 125 transitions. [2022-07-22 11:06:35,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:35,175 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 125 transitions. [2022-07-22 11:06:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 11:06:35,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:35,177 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-22 11:06:35,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:35,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:35,386 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash -514341681, now seen corresponding path program 2 times [2022-07-22 11:06:35,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:35,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282263266] [2022-07-22 11:06:35,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:06:35,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:35,388 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:35,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-22 11:06:35,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:06:35,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:35,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:06:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:35,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:35,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:35,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282263266] [2022-07-22 11:06:35,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282263266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:35,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:35,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-22 11:06:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797086498] [2022-07-22 11:06:35,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 11:06:35,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:35,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 11:06:35,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:06:35,742 INFO L87 Difference]: Start difference. First operand 98 states and 125 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:36,033 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-07-22 11:06:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:06:36,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-07-22 11:06:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:36,034 INFO L225 Difference]: With dead ends: 105 [2022-07-22 11:06:36,034 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 11:06:36,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:06:36,035 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 124 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:36,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 599 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:06:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 11:06:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-22 11:06:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 74 states have internal predecessors, (80), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (23), 14 states have call predecessors, (23), 14 states have call successors, (23) [2022-07-22 11:06:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-07-22 11:06:36,048 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 82 [2022-07-22 11:06:36,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:36,048 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-07-22 11:06:36,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-07-22 11:06:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 11:06:36,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:36,049 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:06:36,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:36,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:36,258 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1357497146, now seen corresponding path program 1 times [2022-07-22 11:06:36,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:36,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250986587] [2022-07-22 11:06:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:36,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:36,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:36,260 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:36,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-22 11:06:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 11:06:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 11:06:37,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:06:42,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250986587] [2022-07-22 11:06:42,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250986587] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:42,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:42,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-07-22 11:06:42,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236961049] [2022-07-22 11:06:42,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:42,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 11:06:42,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 11:06:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 11:06:42,060 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:06:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:56,826 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2022-07-22 11:06:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 11:06:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2022-07-22 11:06:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:56,829 INFO L225 Difference]: With dead ends: 104 [2022-07-22 11:06:56,829 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 11:06:56,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=380, Invalid=4042, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 11:06:56,830 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 138 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:56,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1152 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1220 Invalid, 0 Unknown, 100 Unchecked, 6.7s Time] [2022-07-22 11:06:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 11:06:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-07-22 11:06:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 75 states have internal predecessors, (82), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (23), 15 states have call predecessors, (23), 14 states have call successors, (23) [2022-07-22 11:06:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2022-07-22 11:06:56,841 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 84 [2022-07-22 11:06:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:56,841 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2022-07-22 11:06:56,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:06:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2022-07-22 11:06:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 11:06:56,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:56,842 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-22 11:06:56,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-07-22 11:06:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:57,052 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash 160331167, now seen corresponding path program 1 times [2022-07-22 11:06:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462546684] [2022-07-22 11:06:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:06:57,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:57,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:57,054 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:57,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-22 11:06:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:06:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:06:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:57,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:06:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:06:57,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:06:57,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462546684] [2022-07-22 11:06:57,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462546684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:06:57,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:06:57,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-22 11:06:57,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463480667] [2022-07-22 11:06:57,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:06:57,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 11:06:57,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:06:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 11:06:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:06:57,405 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:57,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:06:57,710 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2022-07-22 11:06:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:06:57,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2022-07-22 11:06:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:06:57,711 INFO L225 Difference]: With dead ends: 110 [2022-07-22 11:06:57,711 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 11:06:57,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:06:57,712 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 111 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:06:57,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 727 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:06:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 11:06:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-07-22 11:06:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.161764705882353) internal successors, (79), 72 states have internal predecessors, (79), 15 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-22 11:06:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2022-07-22 11:06:57,726 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 80 [2022-07-22 11:06:57,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:06:57,726 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-07-22 11:06:57,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:06:57,726 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2022-07-22 11:06:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 11:06:57,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:06:57,727 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:06:57,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-22 11:06:57,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:06:57,937 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:06:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:06:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1014343994, now seen corresponding path program 2 times [2022-07-22 11:06:57,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:06:57,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977840088] [2022-07-22 11:06:57,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:06:57,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:06:57,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:06:57,941 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:06:57,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-22 11:06:58,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:06:58,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:06:58,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 11:06:58,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:06:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 11:06:59,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:07:03,926 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:03,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977840088] [2022-07-22 11:07:03,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977840088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:03,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:03,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-07-22 11:07:03,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346585318] [2022-07-22 11:07:03,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:03,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 11:07:03,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 11:07:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 11:07:03,928 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:07:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:21,678 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2022-07-22 11:07:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 11:07:21,681 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 84 [2022-07-22 11:07:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:21,681 INFO L225 Difference]: With dead ends: 102 [2022-07-22 11:07:21,681 INFO L226 Difference]: Without dead ends: 97 [2022-07-22 11:07:21,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=356, Invalid=3426, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 11:07:21,683 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 111 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:07:21,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1188 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1191 Invalid, 0 Unknown, 3 Unchecked, 7.5s Time] [2022-07-22 11:07:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-22 11:07:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2022-07-22 11:07:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.161764705882353) internal successors, (79), 72 states have internal predecessors, (79), 15 states have call successors, (15), 5 states have call predecessors, (15), 9 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-07-22 11:07:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2022-07-22 11:07:21,697 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 115 transitions. Word has length 84 [2022-07-22 11:07:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:21,697 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 115 transitions. [2022-07-22 11:07:21,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:07:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 115 transitions. [2022-07-22 11:07:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 11:07:21,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:21,699 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-22 11:07:21,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-22 11:07:21,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:21,908 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:21,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:21,908 INFO L85 PathProgramCache]: Analyzing trace with hash -411611933, now seen corresponding path program 2 times [2022-07-22 11:07:21,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:21,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777865231] [2022-07-22 11:07:21,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:07:21,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:21,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:21,910 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:07:21,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-22 11:07:21,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:07:21,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:07:21,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:07:22,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 11:07:22,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:22,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777865231] [2022-07-22 11:07:22,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777865231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:22,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:22,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-22 11:07:22,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978193939] [2022-07-22 11:07:22,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 11:07:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 11:07:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:07:22,246 INFO L87 Difference]: Start difference. First operand 93 states and 115 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:07:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:22,575 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2022-07-22 11:07:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 11:07:22,576 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 80 [2022-07-22 11:07:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:22,577 INFO L225 Difference]: With dead ends: 105 [2022-07-22 11:07:22,577 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 11:07:22,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-07-22 11:07:22,578 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 148 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:07:22,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 532 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:07:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 11:07:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2022-07-22 11:07:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 69 states have internal predecessors, (76), 15 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-07-22 11:07:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2022-07-22 11:07:22,591 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 80 [2022-07-22 11:07:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:22,591 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2022-07-22 11:07:22,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-07-22 11:07:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2022-07-22 11:07:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 11:07:22,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:22,592 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:07:22,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:22,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:22,802 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash 727034220, now seen corresponding path program 1 times [2022-07-22 11:07:22,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:22,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064372525] [2022-07-22 11:07:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:07:22,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:22,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:22,804 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:07:22,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-22 11:07:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:07:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 11:07:22,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 11:07:24,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:07:28,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:28,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064372525] [2022-07-22 11:07:28,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064372525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:28,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:28,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-07-22 11:07:28,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183747838] [2022-07-22 11:07:28,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:28,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 11:07:28,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 11:07:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 11:07:28,865 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:07:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:44,192 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-07-22 11:07:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 11:07:44,193 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2022-07-22 11:07:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:44,194 INFO L225 Difference]: With dead ends: 100 [2022-07-22 11:07:44,194 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 11:07:44,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=330, Invalid=3210, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 11:07:44,196 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 111 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:07:44,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1229 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1056 Invalid, 0 Unknown, 46 Unchecked, 7.0s Time] [2022-07-22 11:07:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 11:07:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-07-22 11:07:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-07-22 11:07:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-07-22 11:07:44,206 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 86 [2022-07-22 11:07:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:44,206 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-07-22 11:07:44,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:07:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-07-22 11:07:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 11:07:44,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:44,207 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:07:44,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-07-22 11:07:44,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:44,407 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash 608590994, now seen corresponding path program 1 times [2022-07-22 11:07:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:44,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850846232] [2022-07-22 11:07:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:07:44,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:44,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:44,409 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:07:44,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-22 11:07:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:07:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 11:07:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:07:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 11:07:45,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:07:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:07:51,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:07:51,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850846232] [2022-07-22 11:07:51,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850846232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:07:51,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:07:51,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2022-07-22 11:07:51,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808027373] [2022-07-22 11:07:51,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:07:51,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 11:07:51,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:07:51,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 11:07:51,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 11:07:51,897 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:07:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:07:58,812 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2022-07-22 11:07:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 11:07:58,812 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2022-07-22 11:07:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:07:58,813 INFO L225 Difference]: With dead ends: 95 [2022-07-22 11:07:58,813 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 11:07:58,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=224, Invalid=3198, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 11:07:58,815 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 63 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:07:58,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1549 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1359 Invalid, 0 Unknown, 92 Unchecked, 4.1s Time] [2022-07-22 11:07:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 11:07:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-07-22 11:07:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-07-22 11:07:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-07-22 11:07:58,826 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 86 [2022-07-22 11:07:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:07:58,826 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-07-22 11:07:58,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:07:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-07-22 11:07:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 11:07:58,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:07:58,827 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:07:58,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-22 11:07:59,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:07:59,037 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:07:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:07:59,037 INFO L85 PathProgramCache]: Analyzing trace with hash -215268500, now seen corresponding path program 2 times [2022-07-22 11:07:59,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:07:59,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063894341] [2022-07-22 11:07:59,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:07:59,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:07:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:07:59,039 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:07:59,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-22 11:07:59,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:07:59,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:07:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 11:07:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:08:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 11:08:00,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:08:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:08:05,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:08:05,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063894341] [2022-07-22 11:08:05,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063894341] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:08:05,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:08:05,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-07-22 11:08:05,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578126271] [2022-07-22 11:08:05,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:08:05,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 11:08:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:08:05,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 11:08:05,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 11:08:05,062 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:08:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:08:17,313 INFO L93 Difference]: Finished difference Result 101 states and 119 transitions. [2022-07-22 11:08:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 11:08:17,315 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2022-07-22 11:08:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:08:17,316 INFO L225 Difference]: With dead ends: 101 [2022-07-22 11:08:17,316 INFO L226 Difference]: Without dead ends: 77 [2022-07-22 11:08:17,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=327, Invalid=3333, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 11:08:17,317 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 92 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-07-22 11:08:17,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1130 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1050 Invalid, 0 Unknown, 4 Unchecked, 4.8s Time] [2022-07-22 11:08:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-22 11:08:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-07-22 11:08:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-22 11:08:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-07-22 11:08:17,324 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 86 [2022-07-22 11:08:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:08:17,324 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-07-22 11:08:17,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:08:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-07-22 11:08:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 11:08:17,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:08:17,326 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:08:17,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-22 11:08:17,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:08:17,527 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:08:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:08:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1561964758, now seen corresponding path program 2 times [2022-07-22 11:08:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:08:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846271707] [2022-07-22 11:08:17,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:08:17,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:08:17,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:08:17,529 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:08:17,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-22 11:08:17,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:08:17,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:08:17,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 11:08:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:08:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 11:08:19,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:08:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-22 11:08:24,682 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-22 11:08:24,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846271707] [2022-07-22 11:08:24,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846271707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:08:24,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:08:24,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2022-07-22 11:08:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917602082] [2022-07-22 11:08:24,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 11:08:24,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 11:08:24,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-22 11:08:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 11:08:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1702, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 11:08:24,684 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:08:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:08:29,832 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2022-07-22 11:08:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 11:08:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 86 [2022-07-22 11:08:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:08:29,833 INFO L225 Difference]: With dead ends: 84 [2022-07-22 11:08:29,833 INFO L226 Difference]: Without dead ends: 79 [2022-07-22 11:08:29,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=217, Invalid=3089, Unknown=0, NotChecked=0, Total=3306 [2022-07-22 11:08:29,835 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 11:08:29,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1115 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 911 Invalid, 0 Unknown, 3 Unchecked, 2.5s Time] [2022-07-22 11:08:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-22 11:08:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-07-22 11:08:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-22 11:08:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2022-07-22 11:08:29,842 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 86 [2022-07-22 11:08:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:08:29,843 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2022-07-22 11:08:29,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.7804878048780488) internal successors, (73), 39 states have internal predecessors, (73), 12 states have call successors, (15), 2 states have call predecessors, (15), 5 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 11:08:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2022-07-22 11:08:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-22 11:08:29,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:08:29,843 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 11:08:29,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-07-22 11:08:30,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-22 11:08:30,044 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:08:30,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:08:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1052491668, now seen corresponding path program 1 times [2022-07-22 11:08:30,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-22 11:08:30,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3734718] [2022-07-22 11:08:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:08:30,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-22 11:08:30,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-22 11:08:30,046 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-22 11:08:30,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-22 11:08:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:08:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 11:08:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:08:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-22 11:08:32,112 INFO L328 TraceCheckSpWp]: Computing backward predicates...