./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/bor2.i --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/array-crafted/bor2.i -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 5a66d4c531614f6a758ec8a672ead44330d05e74c75b0a444a0f213a0e825065 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:59:56,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:59:56,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:59:56,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:59:56,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:59:56,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:59:56,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:59:56,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:59:56,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:59:56,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:59:56,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:59:56,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:59:56,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:59:56,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:59:56,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:59:56,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:59:56,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:59:56,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:59:56,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:59:56,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:59:56,550 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:59:56,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:59:56,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:59:56,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:59:56,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:59:56,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:59:56,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:59:56,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:59:56,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:59:56,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:59:56,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:59:56,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:59:56,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:59:56,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:59:56,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:59:56,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:59:56,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:59:56,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:59:56,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:59:56,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:59:56,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:59:56,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:59:56,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:59:56,607 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:59:56,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:59:56,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:59:56,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:59:56,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:59:56,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:59:56,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:59:56,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:59:56,611 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:59:56,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:59:56,612 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:59:56,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:59:56,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:59:56,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:59:56,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:59:56,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:59:56,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:59:56,613 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:59:56,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:59:56,614 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:59:56,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:59:56,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:59:56,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:59:56,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:59:56,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:59:56,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:59:56,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:59:56,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:59:56,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:59:56,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:59:56,620 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:59:56,620 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:59:56,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:59:56,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a66d4c531614f6a758ec8a672ead44330d05e74c75b0a444a0f213a0e825065 [2022-07-22 09:59:56,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:59:56,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:59:56,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:59:56,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:59:56,863 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:59:56,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor2.i [2022-07-22 09:59:56,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4daffa81/e0fbf88683ff49d88a4a876ae31e0635/FLAGbaf444e00 [2022-07-22 09:59:57,310 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:59:57,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor2.i [2022-07-22 09:59:57,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4daffa81/e0fbf88683ff49d88a4a876ae31e0635/FLAGbaf444e00 [2022-07-22 09:59:57,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4daffa81/e0fbf88683ff49d88a4a876ae31e0635 [2022-07-22 09:59:57,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:59:57,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:59:57,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:59:57,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:59:57,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:59:57,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a50730b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57, skipping insertion in model container [2022-07-22 09:59:57,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:59:57,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:59:57,499 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/array-crafted/bor2.i[1291,1304] [2022-07-22 09:59:57,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:59:57,519 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:59:57,535 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/array-crafted/bor2.i[1291,1304] [2022-07-22 09:59:57,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:59:57,545 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:59:57,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57 WrapperNode [2022-07-22 09:59:57,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:59:57,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:59:57,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:59:57,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:59:57,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,591 INFO L137 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-07-22 09:59:57,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:59:57,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:59:57,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:59:57,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:59:57,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:59:57,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:59:57,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:59:57,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:59:57,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (1/1) ... [2022-07-22 09:59:57,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:59:57,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:59:57,655 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 09:59:57,657 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 09:59:57,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:59:57,683 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-07-22 09:59:57,683 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-07-22 09:59:57,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:59:57,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:59:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:59:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:59:57,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:59:57,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:59:57,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:59:57,766 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:59:57,767 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:59:58,014 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:59:58,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:59:58,023 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 09:59:58,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:59:58 BoogieIcfgContainer [2022-07-22 09:59:58,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:59:58,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:59:58,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:59:58,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:59:58,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:59:57" (1/3) ... [2022-07-22 09:59:58,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c1757c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:59:58, skipping insertion in model container [2022-07-22 09:59:58,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:59:57" (2/3) ... [2022-07-22 09:59:58,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c1757c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:59:58, skipping insertion in model container [2022-07-22 09:59:58,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:59:58" (3/3) ... [2022-07-22 09:59:58,032 INFO L111 eAbstractionObserver]: Analyzing ICFG bor2.i [2022-07-22 09:59:58,064 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:59:58,064 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:59:58,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:59:58,136 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@3f1bfc66, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d135f5e [2022-07-22 09:59:58,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:59:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:59:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:59:58,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:59:58,146 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] [2022-07-22 09:59:58,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:59:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:59:58,151 INFO L85 PathProgramCache]: Analyzing trace with hash -565416169, now seen corresponding path program 1 times [2022-07-22 09:59:58,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:59:58,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260269266] [2022-07-22 09:59:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:59:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:59:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 09:59:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:59:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,356 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 09:59:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:59:58,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260269266] [2022-07-22 09:59:58,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260269266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:59:58,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:59:58,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:59:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780991361] [2022-07-22 09:59:58,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:59:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:59:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:59:58,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:59:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:59:58,390 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:59:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:59:58,433 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2022-07-22 09:59:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:59:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-22 09:59:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:59:58,443 INFO L225 Difference]: With dead ends: 68 [2022-07-22 09:59:58,444 INFO L226 Difference]: Without dead ends: 37 [2022-07-22 09:59:58,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 09:59:58,451 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:59:58,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:59:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-22 09:59:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2022-07-22 09:59:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:59:58,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2022-07-22 09:59:58,486 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 28 [2022-07-22 09:59:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:59:58,487 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2022-07-22 09:59:58,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:59:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2022-07-22 09:59:58,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:59:58,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:59:58,491 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] [2022-07-22 09:59:58,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:59:58,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:59:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:59:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1018640069, now seen corresponding path program 1 times [2022-07-22 09:59:58,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:59:58,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722654743] [2022-07-22 09:59:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:58,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:59:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 09:59:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 09:59:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 09:59:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 09:59:58,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:59:58,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722654743] [2022-07-22 09:59:58,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722654743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:59:58,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547730190] [2022-07-22 09:59:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:58,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:59:58,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:59:58,631 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 09:59:58,632 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 09:59:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:58,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:59:58,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:59:58,735 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 09:59:58,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:59:58,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547730190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:59:58,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:59:58,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 09:59:58,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146704958] [2022-07-22 09:59:58,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:59:58,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:59:58,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:59:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:59:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 09:59:58,746 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:59:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:59:58,767 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-07-22 09:59:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:59:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-22 09:59:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:59:58,769 INFO L225 Difference]: With dead ends: 52 [2022-07-22 09:59:58,769 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 09:59:58,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 09:59:58,771 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:59:58,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:59:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 09:59:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-07-22 09:59:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:59:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-07-22 09:59:58,778 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 28 [2022-07-22 09:59:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:59:58,778 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-07-22 09:59:58,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 09:59:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-07-22 09:59:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 09:59:58,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:59:58,779 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] [2022-07-22 09:59:58,800 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 09:59:58,983 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 09:59:58,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:59:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:59:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash -497824771, now seen corresponding path program 1 times [2022-07-22 09:59:58,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:59:58,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879793390] [2022-07-22 09:59:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:58,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:59:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:59:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 09:59:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 09:59:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:59:59,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:59:59,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879793390] [2022-07-22 09:59:59,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879793390] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:59:59,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563500983] [2022-07-22 09:59:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:59,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:59:59,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:59:59,076 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 09:59:59,080 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 09:59:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:59:59,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:59:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 09:59:59,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:59:59,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563500983] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:59:59,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:59:59,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-22 09:59:59,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698323899] [2022-07-22 09:59:59,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:59:59,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:59:59,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:59:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:59:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 09:59:59,163 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:59:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:59:59,172 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2022-07-22 09:59:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:59:59,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-22 09:59:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:59:59,173 INFO L225 Difference]: With dead ends: 57 [2022-07-22 09:59:59,174 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 09:59:59,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 09:59:59,175 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:59:59,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:59:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 09:59:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2022-07-22 09:59:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:59:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-22 09:59:59,179 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 30 [2022-07-22 09:59:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:59:59,180 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-22 09:59:59,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:59:59,180 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-22 09:59:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 09:59:59,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:59:59,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:59:59,199 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 09:59:59,399 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,SelfDestructingSolverStorable2 [2022-07-22 09:59:59,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:59:59,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:59:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1532793032, now seen corresponding path program 1 times [2022-07-22 09:59:59,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:59:59,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317871371] [2022-07-22 09:59:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:59,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:59:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:59:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:59:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 09:59:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:59:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:59:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317871371] [2022-07-22 09:59:59,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317871371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:59:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037716001] [2022-07-22 09:59:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:59,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:59:59,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:59:59,502 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 09:59:59,503 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 09:59:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:59:59,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:59:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:59:59,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:59:59,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037716001] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:59:59,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:59:59,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-22 09:59:59,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658883683] [2022-07-22 09:59:59,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:59:59,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:59:59,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:59:59,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:59:59,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-22 09:59:59,580 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:59:59,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:59:59,589 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-07-22 09:59:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:59:59,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-22 09:59:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:59:59,590 INFO L225 Difference]: With dead ends: 49 [2022-07-22 09:59:59,590 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 09:59:59,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-22 09:59:59,591 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:59:59,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 63 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:59:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 09:59:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-07-22 09:59:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 09:59:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-22 09:59:59,596 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 42 [2022-07-22 09:59:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:59:59,596 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-22 09:59:59,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 09:59:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-22 09:59:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 09:59:59,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:59:59,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:59:59,628 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 09:59:59,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:59:59,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:59:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:59:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash 164449686, now seen corresponding path program 1 times [2022-07-22 09:59:59,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:59:59,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846771170] [2022-07-22 09:59:59,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:59,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:59:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 09:59:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 09:59:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 09:59:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 09:59:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:59:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846771170] [2022-07-22 09:59:59,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846771170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:59:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360796071] [2022-07-22 09:59:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:59:59,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:59:59,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:59:59,900 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 09:59:59,902 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 09:59:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:59:59,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:59:59,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:59:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 09:59:59,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 10:00:00,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360796071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:00,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:00,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2022-07-22 10:00:00,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436926906] [2022-07-22 10:00:00,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:00,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 10:00:00,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:00,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 10:00:00,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-22 10:00:00,028 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:00,083 INFO L93 Difference]: Finished difference Result 93 states and 135 transitions. [2022-07-22 10:00:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:00:00,084 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-07-22 10:00:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:00,085 INFO L225 Difference]: With dead ends: 93 [2022-07-22 10:00:00,085 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 10:00:00,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-22 10:00:00,087 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:00,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 170 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:00:00,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 10:00:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2022-07-22 10:00:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-07-22 10:00:00,093 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 44 [2022-07-22 10:00:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:00,093 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-07-22 10:00:00,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-07-22 10:00:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 10:00:00,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:00,095 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:00,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:00:00,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:00,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:00,307 INFO L85 PathProgramCache]: Analyzing trace with hash -724622569, now seen corresponding path program 2 times [2022-07-22 10:00:00,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:00,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230899622] [2022-07-22 10:00:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:00,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:00,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 10:00:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:00,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 10:00:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:00,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-22 10:00:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 10:00:00,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:00,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230899622] [2022-07-22 10:00:00,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230899622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:00,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481326703] [2022-07-22 10:00:00,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:00:00,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:00,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:00,388 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 10:00:00,389 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 10:00:00,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:00:00,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:00:00,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:00:00,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-22 10:00:00,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-22 10:00:00,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481326703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:00,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:00,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-07-22 10:00:00,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308694992] [2022-07-22 10:00:00,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:00,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 10:00:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 10:00:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:00:00,612 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 10:00:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:00,666 INFO L93 Difference]: Finished difference Result 103 states and 140 transitions. [2022-07-22 10:00:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 10:00:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-07-22 10:00:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:00,674 INFO L225 Difference]: With dead ends: 103 [2022-07-22 10:00:00,674 INFO L226 Difference]: Without dead ends: 71 [2022-07-22 10:00:00,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:00:00,680 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:00,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 197 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:00:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-22 10:00:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-07-22 10:00:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-07-22 10:00:00,692 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 62 [2022-07-22 10:00:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:00,692 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-07-22 10:00:00,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 10:00:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-07-22 10:00:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 10:00:00,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:00,694 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:00,720 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 10:00:00,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:00,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1424970623, now seen corresponding path program 3 times [2022-07-22 10:00:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530359265] [2022-07-22 10:00:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:00,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:00:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:00,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 10:00:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:00,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 10:00:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-22 10:00:00,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:00,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530359265] [2022-07-22 10:00:00,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530359265] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:00,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122528500] [2022-07-22 10:00:00,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:00:00,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:00,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:00,987 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 10:00:01,012 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 10:00:01,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 10:00:01,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:00:01,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:00:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-22 10:00:01,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-22 10:00:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122528500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:01,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:01,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-07-22 10:00:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927045736] [2022-07-22 10:00:01,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:01,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 10:00:01,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:01,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 10:00:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:00:01,157 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:00:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:01,234 INFO L93 Difference]: Finished difference Result 159 states and 231 transitions. [2022-07-22 10:00:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 10:00:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-22 10:00:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:01,236 INFO L225 Difference]: With dead ends: 159 [2022-07-22 10:00:01,236 INFO L226 Difference]: Without dead ends: 126 [2022-07-22 10:00:01,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:00:01,237 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 284 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:01,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 147 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:00:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-22 10:00:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2022-07-22 10:00:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2022-07-22 10:00:01,244 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 76 [2022-07-22 10:00:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:01,244 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2022-07-22 10:00:01,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:00:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2022-07-22 10:00:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 10:00:01,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:01,246 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:01,271 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 10:00:01,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:01,471 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1349373549, now seen corresponding path program 4 times [2022-07-22 10:00:01,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:01,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796546003] [2022-07-22 10:00:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:01,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:01,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:00:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:01,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-22 10:00:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:01,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-22 10:00:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-22 10:00:01,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:01,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796546003] [2022-07-22 10:00:01,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796546003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:01,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685751998] [2022-07-22 10:00:01,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:00:01,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:01,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:01,685 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 10:00:01,706 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 10:00:01,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:00:01,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:00:01,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:00:01,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-22 10:00:01,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-22 10:00:02,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685751998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:02,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:02,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-07-22 10:00:02,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247113262] [2022-07-22 10:00:02,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:02,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:00:02,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:02,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:00:02,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:00:02,085 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:02,161 INFO L93 Difference]: Finished difference Result 212 states and 302 transitions. [2022-07-22 10:00:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 10:00:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 124 [2022-07-22 10:00:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:02,164 INFO L225 Difference]: With dead ends: 212 [2022-07-22 10:00:02,164 INFO L226 Difference]: Without dead ends: 150 [2022-07-22 10:00:02,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:00:02,167 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:02,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 244 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:00:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-22 10:00:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 109. [2022-07-22 10:00:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 104 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 137 transitions. [2022-07-22 10:00:02,185 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 137 transitions. Word has length 124 [2022-07-22 10:00:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:02,186 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 137 transitions. [2022-07-22 10:00:02,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 137 transitions. [2022-07-22 10:00:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-22 10:00:02,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:02,193 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:02,226 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 10:00:02,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:02,408 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:02,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1124916869, now seen corresponding path program 5 times [2022-07-22 10:00:02,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:02,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752604565] [2022-07-22 10:00:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:02,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:02,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:00:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:02,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-22 10:00:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:02,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-22 10:00:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-07-22 10:00:02,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:02,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752604565] [2022-07-22 10:00:02,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752604565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:02,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286149022] [2022-07-22 10:00:02,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:00:02,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:02,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:02,739 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 10:00:02,740 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 10:00:03,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-22 10:00:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:00:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:00:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2022-07-22 10:00:03,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-07-22 10:00:03,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286149022] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:03,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:03,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2022-07-22 10:00:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763397987] [2022-07-22 10:00:03,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:03,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 10:00:03,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 10:00:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 10:00:03,950 INFO L87 Difference]: Start difference. First operand 109 states and 137 transitions. Second operand has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:00:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:04,313 INFO L93 Difference]: Finished difference Result 327 states and 489 transitions. [2022-07-22 10:00:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 10:00:04,313 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 148 [2022-07-22 10:00:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:04,315 INFO L225 Difference]: With dead ends: 327 [2022-07-22 10:00:04,315 INFO L226 Difference]: Without dead ends: 265 [2022-07-22 10:00:04,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=659, Invalid=2203, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 10:00:04,319 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 773 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:04,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 327 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:00:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-22 10:00:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 167. [2022-07-22 10:00:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.3641975308641976) internal successors, (221), 162 states have internal predecessors, (221), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2022-07-22 10:00:04,332 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 148 [2022-07-22 10:00:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:04,332 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2022-07-22 10:00:04,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 39 states have internal predecessors, (129), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:00:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2022-07-22 10:00:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-22 10:00:04,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:04,334 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:04,355 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 10:00:04,534 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,SelfDestructingSolverStorable8 [2022-07-22 10:00:04,535 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:04,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1940002591, now seen corresponding path program 6 times [2022-07-22 10:00:04,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:04,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671248225] [2022-07-22 10:00:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:04,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:04,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-22 10:00:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:04,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-22 10:00:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:04,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-22 10:00:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:04,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2022-07-22 10:00:04,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:04,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671248225] [2022-07-22 10:00:04,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671248225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:04,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131664858] [2022-07-22 10:00:04,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:00:04,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:04,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:04,909 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 10:00:04,910 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 10:00:05,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 10:00:05,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:00:05,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:00:05,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2022-07-22 10:00:05,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2022-07-22 10:00:05,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131664858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:05,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:05,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2022-07-22 10:00:05,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478757686] [2022-07-22 10:00:05,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:05,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 10:00:05,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:05,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 10:00:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 10:00:05,111 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:00:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:05,185 INFO L93 Difference]: Finished difference Result 393 states and 572 transitions. [2022-07-22 10:00:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 10:00:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2022-07-22 10:00:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:05,188 INFO L225 Difference]: With dead ends: 393 [2022-07-22 10:00:05,188 INFO L226 Difference]: Without dead ends: 275 [2022-07-22 10:00:05,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 10:00:05,190 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 47 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:05,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 226 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:00:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-22 10:00:05,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 177. [2022-07-22 10:00:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.3430232558139534) internal successors, (231), 172 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 237 transitions. [2022-07-22 10:00:05,197 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 237 transitions. Word has length 246 [2022-07-22 10:00:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:05,198 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 237 transitions. [2022-07-22 10:00:05,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.787878787878788) internal successors, (92), 32 states have internal predecessors, (92), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:00:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 237 transitions. [2022-07-22 10:00:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-07-22 10:00:05,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:05,200 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:05,220 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 10:00:05,415 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,SelfDestructingSolverStorable9 [2022-07-22 10:00:05,415 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1867095591, now seen corresponding path program 7 times [2022-07-22 10:00:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:05,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823149039] [2022-07-22 10:00:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:05,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 10:00:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:05,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-22 10:00:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:05,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-07-22 10:00:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-22 10:00:05,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823149039] [2022-07-22 10:00:05,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823149039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766987341] [2022-07-22 10:00:05,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:00:05,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:05,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:05,800 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 10:00:05,827 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 10:00:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 10:00:05,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-22 10:00:06,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-22 10:00:06,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766987341] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:06,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:06,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-07-22 10:00:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445886824] [2022-07-22 10:00:06,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:06,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-22 10:00:06,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:06,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-22 10:00:06,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 10:00:06,770 INFO L87 Difference]: Start difference. First operand 177 states and 237 transitions. Second operand has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:06,918 INFO L93 Difference]: Finished difference Result 452 states and 652 transitions. [2022-07-22 10:00:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 10:00:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 256 [2022-07-22 10:00:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:06,922 INFO L225 Difference]: With dead ends: 452 [2022-07-22 10:00:06,922 INFO L226 Difference]: Without dead ends: 326 [2022-07-22 10:00:06,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 10:00:06,924 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 64 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:06,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 151 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:00:06,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-22 10:00:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2022-07-22 10:00:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.2633928571428572) internal successors, (283), 224 states have internal predecessors, (283), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 289 transitions. [2022-07-22 10:00:06,937 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 289 transitions. Word has length 256 [2022-07-22 10:00:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:06,939 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 289 transitions. [2022-07-22 10:00:06,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 289 transitions. [2022-07-22 10:00:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-07-22 10:00:06,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:06,943 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:06,979 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 10:00:07,155 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,SelfDestructingSolverStorable10 [2022-07-22 10:00:07,155 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash 316429581, now seen corresponding path program 8 times [2022-07-22 10:00:07,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:07,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286627465] [2022-07-22 10:00:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:07,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:08,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:00:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:08,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-07-22 10:00:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:08,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-07-22 10:00:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-22 10:00:08,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:08,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286627465] [2022-07-22 10:00:08,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286627465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:08,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735604658] [2022-07-22 10:00:08,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:00:08,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:08,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:08,245 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 10:00:08,247 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 10:00:08,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:00:08,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:00:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 10:00:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-22 10:00:08,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-22 10:00:11,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735604658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:11,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:11,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-07-22 10:00:11,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584262787] [2022-07-22 10:00:11,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-07-22 10:00:11,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-07-22 10:00:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-07-22 10:00:11,186 INFO L87 Difference]: Start difference. First operand 229 states and 289 transitions. Second operand has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:11,433 INFO L93 Difference]: Finished difference Result 556 states and 782 transitions. [2022-07-22 10:00:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-22 10:00:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 308 [2022-07-22 10:00:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:11,435 INFO L225 Difference]: With dead ends: 556 [2022-07-22 10:00:11,436 INFO L226 Difference]: Without dead ends: 430 [2022-07-22 10:00:11,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-07-22 10:00:11,439 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 116 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:11,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 213 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:00:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-07-22 10:00:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 333. [2022-07-22 10:00:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.1798780487804879) internal successors, (387), 328 states have internal predecessors, (387), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 393 transitions. [2022-07-22 10:00:11,457 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 393 transitions. Word has length 308 [2022-07-22 10:00:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:11,457 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 393 transitions. [2022-07-22 10:00:11,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.207547169811321) internal successors, (234), 105 states have internal predecessors, (234), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:11,457 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 393 transitions. [2022-07-22 10:00:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2022-07-22 10:00:11,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:11,460 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:11,483 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 10:00:11,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 10:00:11,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash 727115125, now seen corresponding path program 9 times [2022-07-22 10:00:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549632059] [2022-07-22 10:00:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:11,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:15,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-22 10:00:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:15,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2022-07-22 10:00:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:15,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 347 [2022-07-22 10:00:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2022-07-22 10:00:15,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:15,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549632059] [2022-07-22 10:00:15,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549632059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:15,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25107475] [2022-07-22 10:00:15,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:00:15,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:15,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:15,181 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 10:00:15,183 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 10:00:15,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 10:00:15,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:00:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 10:00:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 12355 trivial. 0 not checked. [2022-07-22 10:00:15,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2022-07-22 10:00:16,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25107475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:16,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:16,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 9, 9] total 120 [2022-07-22 10:00:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182070188] [2022-07-22 10:00:16,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:16,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-07-22 10:00:16,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:16,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-07-22 10:00:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5581, Invalid=8699, Unknown=0, NotChecked=0, Total=14280 [2022-07-22 10:00:16,026 INFO L87 Difference]: Start difference. First operand 333 states and 393 transitions. Second operand has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:00:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:16,380 INFO L93 Difference]: Finished difference Result 575 states and 758 transitions. [2022-07-22 10:00:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-07-22 10:00:16,381 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 412 [2022-07-22 10:00:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:16,383 INFO L225 Difference]: With dead ends: 575 [2022-07-22 10:00:16,383 INFO L226 Difference]: Without dead ends: 449 [2022-07-22 10:00:16,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 815 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5581, Invalid=8699, Unknown=0, NotChecked=0, Total=14280 [2022-07-22 10:00:16,386 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 138 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:16,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 255 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:00:16,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-22 10:00:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 351. [2022-07-22 10:00:16,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.170520231213873) internal successors, (405), 346 states have internal predecessors, (405), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 411 transitions. [2022-07-22 10:00:16,397 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 411 transitions. Word has length 412 [2022-07-22 10:00:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:16,397 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 411 transitions. [2022-07-22 10:00:16,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.216666666666667) internal successors, (266), 119 states have internal predecessors, (266), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:00:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 411 transitions. [2022-07-22 10:00:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-07-22 10:00:16,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:16,400 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:16,443 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 10:00:16,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 10:00:16,616 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1691242201, now seen corresponding path program 10 times [2022-07-22 10:00:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:16,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771514476] [2022-07-22 10:00:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:16,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:20,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-22 10:00:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:20,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2022-07-22 10:00:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:20,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 365 [2022-07-22 10:00:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-22 10:00:20,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:20,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771514476] [2022-07-22 10:00:20,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771514476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:20,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219602903] [2022-07-22 10:00:20,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:00:20,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:20,054 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 10:00:20,087 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 10:00:20,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:00:20,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:00:20,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-22 10:00:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:00:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-22 10:00:20,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:00:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-22 10:00:30,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219602903] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:00:30,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:00:30,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-07-22 10:00:30,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037901504] [2022-07-22 10:00:30,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:00:30,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2022-07-22 10:00:30,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:00:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2022-07-22 10:00:30,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-07-22 10:00:30,012 INFO L87 Difference]: Start difference. First operand 351 states and 411 transitions. Second operand has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:30,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:00:30,694 INFO L93 Difference]: Finished difference Result 800 states and 1079 transitions. [2022-07-22 10:00:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-07-22 10:00:30,695 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 430 [2022-07-22 10:00:30,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:00:30,697 INFO L225 Difference]: With dead ends: 800 [2022-07-22 10:00:30,697 INFO L226 Difference]: Without dead ends: 658 [2022-07-22 10:00:30,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 760 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2022-07-22 10:00:30,701 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:00:30,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 306 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:00:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-07-22 10:00:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 561. [2022-07-22 10:00:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 556 states have (on average 1.106115107913669) internal successors, (615), 556 states have internal predecessors, (615), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:00:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 621 transitions. [2022-07-22 10:00:30,713 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 621 transitions. Word has length 430 [2022-07-22 10:00:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:00:30,714 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 621 transitions. [2022-07-22 10:00:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.1037735849056602) internal successors, (446), 211 states have internal predecessors, (446), 1 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:00:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 621 transitions. [2022-07-22 10:00:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-22 10:00:30,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:00:30,718 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:00:30,740 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 10:00:30,934 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,SelfDestructingSolverStorable13 [2022-07-22 10:00:30,934 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:00:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:00:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1870976967, now seen corresponding path program 11 times [2022-07-22 10:00:30,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:00:30,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687005150] [2022-07-22 10:00:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:00:30,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:00:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:43,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 419 [2022-07-22 10:00:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:43,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2022-07-22 10:00:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:43,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 575 [2022-07-22 10:00:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:00:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47045 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2022-07-22 10:00:43,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:00:43,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687005150] [2022-07-22 10:00:43,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687005150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:00:43,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187236601] [2022-07-22 10:00:43,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:00:43,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:00:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:00:43,213 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 10:00:43,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process