./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:08:42,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:08:42,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:08:42,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:08:42,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:08:42,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:08:42,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:08:42,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:08:42,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:08:42,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:08:42,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:08:42,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:08:42,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:08:42,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:08:42,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:08:42,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:08:42,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:08:42,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:08:42,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:08:42,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:08:42,610 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:08:42,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:08:42,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:08:42,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:08:42,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:08:42,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:08:42,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:08:42,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:08:42,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:08:42,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:08:42,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:08:42,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:08:42,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:08:42,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:08:42,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:08:42,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:08:42,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:08:42,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:08:42,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:08:42,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:08:42,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:08:42,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:08:42,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:08:42,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:08:42,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:08:42,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:08:42,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:08:42,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:08:42,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:08:42,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:08:42,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:08:42,664 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:08:42,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:08:42,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:08:42,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:08:42,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:08:42,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:08:42,666 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:08:42,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:08:42,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:08:42,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:08:42,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:08:42,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:08:42,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:08:42,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:08:42,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:08:42,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:08:42,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:08:42,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:08:42,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:08:42,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:08:42,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:08:42,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:08:42,669 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:08:42,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:08:42,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:08:42,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2022-07-22 10:08:42,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:08:42,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:08:42,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:08:42,919 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:08:42,919 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:08:42,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum4.c [2022-07-22 10:08:42,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea36583f2/1395bf6cf08c49d0a9d3a55ed294fd35/FLAGc1abf222b [2022-07-22 10:08:43,332 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:08:43,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum4.c [2022-07-22 10:08:43,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea36583f2/1395bf6cf08c49d0a9d3a55ed294fd35/FLAGc1abf222b [2022-07-22 10:08:43,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea36583f2/1395bf6cf08c49d0a9d3a55ed294fd35 [2022-07-22 10:08:43,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:08:43,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:08:43,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:08:43,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:08:43,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:08:43,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4099b63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43, skipping insertion in model container [2022-07-22 10:08:43,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:08:43,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:08:43,523 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/zero_sum4.c[400,413] [2022-07-22 10:08:43,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:08:43,574 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:08:43,585 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/zero_sum4.c[400,413] [2022-07-22 10:08:43,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:08:43,605 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:08:43,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43 WrapperNode [2022-07-22 10:08:43,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:08:43,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:08:43,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:08:43,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:08:43,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,645 INFO L137 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2022-07-22 10:08:43,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:08:43,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:08:43,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:08:43,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:08:43,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:08:43,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:08:43,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:08:43,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:08:43,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (1/1) ... [2022-07-22 10:08:43,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:08:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:43,704 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 10:08:43,726 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 10:08:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:08:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:08:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:08:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:08:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:08:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:08:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:08:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:08:43,817 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:08:43,818 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:08:43,943 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:08:43,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:08:43,949 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-22 10:08:43,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:08:43 BoogieIcfgContainer [2022-07-22 10:08:43,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:08:43,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:08:43,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:08:43,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:08:43,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:08:43" (1/3) ... [2022-07-22 10:08:43,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a57ab34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:08:43, skipping insertion in model container [2022-07-22 10:08:43,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:08:43" (2/3) ... [2022-07-22 10:08:43,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a57ab34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:08:43, skipping insertion in model container [2022-07-22 10:08:43,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:08:43" (3/3) ... [2022-07-22 10:08:43,959 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2022-07-22 10:08:43,973 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:08:43,974 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:08:44,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:08:44,024 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@1ada3246, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@cb60dbc [2022-07-22 10:08:44,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:08:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 10:08:44,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:44,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:44,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:44,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2022-07-22 10:08:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:44,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379163093] [2022-07-22 10:08:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:44,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:08:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:44,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379163093] [2022-07-22 10:08:44,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379163093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:08:44,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:08:44,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:08:44,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276839327] [2022-07-22 10:08:44,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:08:44,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:08:44,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:44,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:08:44,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:08:44,303 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:44,327 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2022-07-22 10:08:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:08:44,330 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 10:08:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:44,337 INFO L225 Difference]: With dead ends: 71 [2022-07-22 10:08:44,337 INFO L226 Difference]: Without dead ends: 33 [2022-07-22 10:08:44,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:08:44,344 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:44,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:08:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-22 10:08:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-22 10:08:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-22 10:08:44,381 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2022-07-22 10:08:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:44,381 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-22 10:08:44,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-22 10:08:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 10:08:44,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:44,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:44,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:08:44,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:44,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2022-07-22 10:08:44,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:44,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592233458] [2022-07-22 10:08:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:08:44,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:44,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592233458] [2022-07-22 10:08:44,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592233458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:08:44,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:08:44,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 10:08:44,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628813467] [2022-07-22 10:08:44,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:08:44,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:08:44,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:08:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 10:08:44,501 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:44,569 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-07-22 10:08:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:08:44,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 10:08:44,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:44,572 INFO L225 Difference]: With dead ends: 63 [2022-07-22 10:08:44,572 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 10:08:44,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:08:44,578 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:44,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:08:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 10:08:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-07-22 10:08:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-22 10:08:44,590 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2022-07-22 10:08:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:44,592 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-22 10:08:44,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-22 10:08:44,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 10:08:44,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:44,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:44,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:08:44,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:44,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2022-07-22 10:08:44,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:44,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840140233] [2022-07-22 10:08:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:44,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:08:44,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:44,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840140233] [2022-07-22 10:08:44,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840140233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:08:44,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:08:44,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:08:44,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351071393] [2022-07-22 10:08:44,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:08:44,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:08:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:08:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:08:44,650 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:44,748 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2022-07-22 10:08:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:08:44,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-22 10:08:44,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:44,750 INFO L225 Difference]: With dead ends: 75 [2022-07-22 10:08:44,750 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 10:08:44,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:08:44,751 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:44,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 19 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:08:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 10:08:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-07-22 10:08:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-07-22 10:08:44,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2022-07-22 10:08:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:44,759 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-07-22 10:08:44,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-07-22 10:08:44,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 10:08:44,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:44,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:44,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 10:08:44,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2022-07-22 10:08:44,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:44,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775014629] [2022-07-22 10:08:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:44,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 10:08:44,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:44,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775014629] [2022-07-22 10:08:44,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775014629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:44,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632434569] [2022-07-22 10:08:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:44,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:44,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:44,851 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 10:08:44,881 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 10:08:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:44,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:08:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 10:08:45,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 10:08:45,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632434569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:45,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:45,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 10:08:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369303876] [2022-07-22 10:08:45,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 10:08:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 10:08:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:08:45,045 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:45,095 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-07-22 10:08:45,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 10:08:45,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-22 10:08:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:45,096 INFO L225 Difference]: With dead ends: 81 [2022-07-22 10:08:45,096 INFO L226 Difference]: Without dead ends: 45 [2022-07-22 10:08:45,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:08:45,097 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:45,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 77 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:08:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-22 10:08:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-07-22 10:08:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-07-22 10:08:45,104 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2022-07-22 10:08:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:45,104 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-07-22 10:08:45,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-07-22 10:08:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-22 10:08:45,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:45,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:45,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 10:08:45,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:45,310 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:45,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:45,311 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2022-07-22 10:08:45,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:45,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728029370] [2022-07-22 10:08:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:45,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 10:08:45,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:45,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728029370] [2022-07-22 10:08:45,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728029370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:45,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080909356] [2022-07-22 10:08:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:08:45,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:45,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:45,408 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 10:08:45,434 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 10:08:45,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:08:45,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:08:45,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:08:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 10:08:45,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 10:08:45,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080909356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:45,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:45,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-22 10:08:45,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112807461] [2022-07-22 10:08:45,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 10:08:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 10:08:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 10:08:45,693 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:45,844 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2022-07-22 10:08:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 10:08:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-22 10:08:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:45,846 INFO L225 Difference]: With dead ends: 100 [2022-07-22 10:08:45,846 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 10:08:45,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:08:45,847 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:45,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 27 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:08:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 10:08:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2022-07-22 10:08:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-07-22 10:08:45,855 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2022-07-22 10:08:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:45,855 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-07-22 10:08:45,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-07-22 10:08:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 10:08:45,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:45,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:45,897 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 10:08:46,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:46,092 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:46,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2022-07-22 10:08:46,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:46,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671853015] [2022-07-22 10:08:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:46,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:08:47,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:47,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671853015] [2022-07-22 10:08:47,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671853015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:47,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407041911] [2022-07-22 10:08:47,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:08:47,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:47,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:47,581 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 10:08:47,583 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 10:08:47,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 10:08:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:08:47,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 10:08:47,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:49,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:08:49,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 30 [2022-07-22 10:08:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:08:49,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:53,809 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:08:53,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 94 [2022-07-22 10:08:54,320 INFO L356 Elim1Store]: treesize reduction 76, result has 10.6 percent of original size [2022-07-22 10:08:54,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 17 [2022-07-22 10:08:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:08:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407041911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:54,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:54,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27, 29] total 65 [2022-07-22 10:08:54,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024065757] [2022-07-22 10:08:54,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 10:08:54,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 10:08:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=3745, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 10:08:54,707 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:58,479 INFO L93 Difference]: Finished difference Result 210 states and 244 transitions. [2022-07-22 10:08:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 10:08:58,480 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-07-22 10:08:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:58,485 INFO L225 Difference]: With dead ends: 210 [2022-07-22 10:08:58,485 INFO L226 Difference]: Without dead ends: 206 [2022-07-22 10:08:58,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 69 SyntacticMatches, 47 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=941, Invalid=8761, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 10:08:58,493 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1068 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:58,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 110 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 430 Invalid, 0 Unknown, 1068 Unchecked, 0.3s Time] [2022-07-22 10:08:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-22 10:08:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 101. [2022-07-22 10:08:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2022-07-22 10:08:58,519 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2022-07-22 10:08:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:58,519 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2022-07-22 10:08:58,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6) internal successors, (169), 65 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2022-07-22 10:08:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 10:08:58,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:58,521 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:58,540 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 10:08:58,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:58,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:58,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:58,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2022-07-22 10:08:58,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:58,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287050208] [2022-07-22 10:08:58,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:58,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 10:08:58,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287050208] [2022-07-22 10:08:58,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287050208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250861001] [2022-07-22 10:08:58,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:08:58,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:58,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:58,845 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 10:08:58,852 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 10:08:58,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:08:58,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:08:58,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:08:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 10:08:59,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 10:08:59,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250861001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:59,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:59,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-22 10:08:59,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296832515] [2022-07-22 10:08:59,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:59,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:08:59,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:59,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:08:59,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:08:59,070 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:08:59,300 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2022-07-22 10:08:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:08:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-22 10:08:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:08:59,302 INFO L225 Difference]: With dead ends: 200 [2022-07-22 10:08:59,302 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 10:08:59,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-22 10:08:59,303 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:08:59,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 97 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:08:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 10:08:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-07-22 10:08:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 102 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-07-22 10:08:59,326 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2022-07-22 10:08:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:08:59,326 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-07-22 10:08:59,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:08:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-07-22 10:08:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 10:08:59,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:08:59,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:08:59,347 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 10:08:59,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:59,535 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:08:59,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:08:59,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1107378484, now seen corresponding path program 5 times [2022-07-22 10:08:59,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:08:59,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839463333] [2022-07-22 10:08:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:08:59,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:08:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:08:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 10:08:59,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:08:59,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839463333] [2022-07-22 10:08:59,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839463333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:08:59,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566542430] [2022-07-22 10:08:59,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:08:59,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:08:59,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:08:59,631 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 10:08:59,632 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 10:08:59,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 10:08:59,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:08:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:08:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:08:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 10:08:59,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:08:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 10:08:59,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566542430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:08:59,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:08:59,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-22 10:08:59,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761323144] [2022-07-22 10:08:59,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:08:59,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 10:08:59,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:08:59,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 10:08:59,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:08:59,857 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:09:00,183 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-07-22 10:09:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 10:09:00,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 10:09:00,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:09:00,185 INFO L225 Difference]: With dead ends: 167 [2022-07-22 10:09:00,185 INFO L226 Difference]: Without dead ends: 86 [2022-07-22 10:09:00,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-07-22 10:09:00,186 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:09:00,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 61 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:09:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-22 10:09:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-07-22 10:09:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-07-22 10:09:00,193 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2022-07-22 10:09:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:09:00,193 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-07-22 10:09:00,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:09:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-07-22 10:09:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-22 10:09:00,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:09:00,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-07-22 10:09:00,224 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 10:09:00,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:00,411 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:09:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:09:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2022-07-22 10:09:00,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:09:00,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953731594] [2022-07-22 10:09:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:09:00,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:09:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:09:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:02,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:09:02,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953731594] [2022-07-22 10:09:02,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953731594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:09:02,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146468271] [2022-07-22 10:09:02,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:09:02,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:09:02,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:09:02,720 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 10:09:02,721 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 10:09:02,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-22 10:09:02,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:09:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 111 conjunts are in the unsatisfiable core [2022-07-22 10:09:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:09:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:04,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:09:31,898 INFO L356 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2022-07-22 10:09:31,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 246 [2022-07-22 10:09:34,641 INFO L356 Elim1Store]: treesize reduction 393, result has 5.1 percent of original size [2022-07-22 10:09:34,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 37 [2022-07-22 10:09:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:09:35,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146468271] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:09:35,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:09:35,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 30, 34] total 100 [2022-07-22 10:09:35,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783516806] [2022-07-22 10:09:35,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:09:35,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-07-22 10:09:35,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:09:35,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-07-22 10:09:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=9153, Unknown=4, NotChecked=0, Total=9900 [2022-07-22 10:09:35,014 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 100 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:13,505 WARN L233 SmtUtils]: Spent 14.09s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 10:10:16,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:16,309 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2022-07-22 10:10:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-07-22 10:10:16,311 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-22 10:10:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:16,312 INFO L225 Difference]: With dead ends: 271 [2022-07-22 10:10:16,312 INFO L226 Difference]: Without dead ends: 265 [2022-07-22 10:10:16,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 98 SyntacticMatches, 25 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12498 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=2423, Invalid=29789, Unknown=8, NotChecked=0, Total=32220 [2022-07-22 10:10:16,318 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 199 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 2922 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 2922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2477 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:16,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 218 Invalid, 6198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 2922 Invalid, 0 Unknown, 2477 Unchecked, 1.9s Time] [2022-07-22 10:10:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-07-22 10:10:16,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 177. [2022-07-22 10:10:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1363636363636365) internal successors, (200), 176 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 200 transitions. [2022-07-22 10:10:16,355 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 200 transitions. Word has length 77 [2022-07-22 10:10:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:16,356 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 200 transitions. [2022-07-22 10:10:16,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 200 transitions. [2022-07-22 10:10:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 10:10:16,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:16,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-07-22 10:10:16,375 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 10:10:16,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:16,562 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash -575533628, now seen corresponding path program 7 times [2022-07-22 10:10:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:16,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305907063] [2022-07-22 10:10:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:16,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 10:10:16,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:16,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305907063] [2022-07-22 10:10:16,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305907063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:16,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450462164] [2022-07-22 10:10:16,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:10:16,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:16,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:16,662 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 10:10:16,663 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 10:10:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:10:16,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 10:10:16,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 10:10:16,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450462164] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:16,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:16,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:10:16,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148720984] [2022-07-22 10:10:16,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:16,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:10:16,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:16,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:10:16,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:10:16,958 INFO L87 Difference]: Start difference. First operand 177 states and 200 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:17,281 INFO L93 Difference]: Finished difference Result 369 states and 416 transitions. [2022-07-22 10:10:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:10:17,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-22 10:10:17,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:17,283 INFO L225 Difference]: With dead ends: 369 [2022-07-22 10:10:17,283 INFO L226 Difference]: Without dead ends: 170 [2022-07-22 10:10:17,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:10:17,285 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:17,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 108 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:10:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-22 10:10:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-07-22 10:10:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.130952380952381) internal successors, (190), 168 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2022-07-22 10:10:17,301 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 79 [2022-07-22 10:10:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:17,301 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2022-07-22 10:10:17,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2022-07-22 10:10:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 10:10:17,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:17,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-07-22 10:10:17,319 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 10:10:17,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:17,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:17,504 INFO L85 PathProgramCache]: Analyzing trace with hash 692239334, now seen corresponding path program 8 times [2022-07-22 10:10:17,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:17,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65766530] [2022-07-22 10:10:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:17,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 10:10:17,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:17,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65766530] [2022-07-22 10:10:17,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65766530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:17,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998405650] [2022-07-22 10:10:17,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:10:17,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:17,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:17,596 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 10:10:17,597 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 10:10:17,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:10:17,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:10:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 10:10:17,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 10:10:17,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998405650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:17,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:17,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:10:17,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819603169] [2022-07-22 10:10:17,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:17,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:10:17,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:17,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:10:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:10:17,796 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:18,082 INFO L93 Difference]: Finished difference Result 243 states and 276 transitions. [2022-07-22 10:10:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 10:10:18,083 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-22 10:10:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:18,083 INFO L225 Difference]: With dead ends: 243 [2022-07-22 10:10:18,084 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 10:10:18,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:10:18,085 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 219 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:18,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 48 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:10:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 10:10:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2022-07-22 10:10:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-07-22 10:10:18,094 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2022-07-22 10:10:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:18,094 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-07-22 10:10:18,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-07-22 10:10:18,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 10:10:18,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:18,095 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:10:18,112 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 10:10:18,295 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,SelfDestructingSolverStorable10 [2022-07-22 10:10:18,296 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2022-07-22 10:10:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551829621] [2022-07-22 10:10:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:18,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 2 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:10:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:22,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551829621] [2022-07-22 10:10:22,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551829621] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:22,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197305177] [2022-07-22 10:10:22,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:10:22,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:22,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:22,810 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 10:10:22,811 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 10:10:22,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 10:10:22,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:22,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 150 conjunts are in the unsatisfiable core [2022-07-22 10:10:22,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:22,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:10:26,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:10:26,685 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:10:26,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 59 [2022-07-22 10:10:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:10:27,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:10:35,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197305177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:35,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:35,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 26, 23] total 108 [2022-07-22 10:10:35,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619712202] [2022-07-22 10:10:35,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:35,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-07-22 10:10:35,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:35,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-07-22 10:10:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=10965, Unknown=0, NotChecked=0, Total=11556 [2022-07-22 10:10:35,606 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 108 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:48,694 INFO L93 Difference]: Finished difference Result 201 states and 220 transitions. [2022-07-22 10:10:48,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-22 10:10:48,694 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-22 10:10:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:48,696 INFO L225 Difference]: With dead ends: 201 [2022-07-22 10:10:48,696 INFO L226 Difference]: Without dead ends: 197 [2022-07-22 10:10:48,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 135 SyntacticMatches, 29 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9984 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1900, Invalid=32881, Unknown=1, NotChecked=0, Total=34782 [2022-07-22 10:10:48,699 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 3278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1017 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:48,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 228 Invalid, 3278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 2018 Invalid, 0 Unknown, 1017 Unchecked, 1.2s Time] [2022-07-22 10:10:48,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-22 10:10:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 161. [2022-07-22 10:10:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1) internal successors, (176), 160 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2022-07-22 10:10:48,730 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 95 [2022-07-22 10:10:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:48,730 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2022-07-22 10:10:48,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.4537037037037037) internal successors, (265), 108 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2022-07-22 10:10:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 10:10:48,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:48,731 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:10:48,754 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 10:10:48,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:48,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:48,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1175667574, now seen corresponding path program 10 times [2022-07-22 10:10:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:48,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72411591] [2022-07-22 10:10:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 10:10:49,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72411591] [2022-07-22 10:10:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72411591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:49,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063509801] [2022-07-22 10:10:49,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:10:49,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:49,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:49,057 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 10:10:49,059 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 10:10:49,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:10:49,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:49,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:10:49,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 10:10:49,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 10:10:49,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063509801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:49,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:49,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-22 10:10:49,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370494982] [2022-07-22 10:10:49,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:49,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 10:10:49,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:49,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 10:10:49,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:10:49,373 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:49,714 INFO L93 Difference]: Finished difference Result 375 states and 411 transitions. [2022-07-22 10:10:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 10:10:49,714 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-22 10:10:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:49,715 INFO L225 Difference]: With dead ends: 375 [2022-07-22 10:10:49,715 INFO L226 Difference]: Without dead ends: 164 [2022-07-22 10:10:49,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:10:49,716 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 144 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:49,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 112 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:10:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-22 10:10:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-07-22 10:10:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0987654320987654) internal successors, (178), 162 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 178 transitions. [2022-07-22 10:10:49,736 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 178 transitions. Word has length 97 [2022-07-22 10:10:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:49,736 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 178 transitions. [2022-07-22 10:10:49,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 178 transitions. [2022-07-22 10:10:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 10:10:49,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:49,737 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:10:49,755 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 10:10:49,941 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,SelfDestructingSolverStorable12 [2022-07-22 10:10:49,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:49,942 INFO L85 PathProgramCache]: Analyzing trace with hash -323654376, now seen corresponding path program 11 times [2022-07-22 10:10:49,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:49,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593140109] [2022-07-22 10:10:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:49,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:10:50,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593140109] [2022-07-22 10:10:50,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593140109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569254352] [2022-07-22 10:10:50,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:10:50,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:50,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:50,048 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 10:10:50,073 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 10:10:50,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 10:10:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:50,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 10:10:50,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:10:50,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:10:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 10:10:50,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569254352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:10:50,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:10:50,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-22 10:10:50,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731016577] [2022-07-22 10:10:50,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:10:50,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:10:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:10:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:10:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:10:50,650 INFO L87 Difference]: Start difference. First operand 163 states and 178 transitions. Second operand has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:10:51,061 INFO L93 Difference]: Finished difference Result 249 states and 276 transitions. [2022-07-22 10:10:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 10:10:51,061 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-07-22 10:10:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:10:51,062 INFO L225 Difference]: With dead ends: 249 [2022-07-22 10:10:51,062 INFO L226 Difference]: Without dead ends: 122 [2022-07-22 10:10:51,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 10:10:51,063 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:10:51,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 65 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:10:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-22 10:10:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-07-22 10:10:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.079646017699115) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-07-22 10:10:51,076 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 99 [2022-07-22 10:10:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:10:51,077 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-07-22 10:10:51,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 29 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:10:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-07-22 10:10:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-22 10:10:51,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:10:51,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:10:51,102 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 10:10:51,299 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,SelfDestructingSolverStorable13 [2022-07-22 10:10:51,300 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:10:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:10:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 12 times [2022-07-22 10:10:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:10:51,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118338951] [2022-07-22 10:10:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:10:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:10:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:10:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:10:57,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:10:57,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118338951] [2022-07-22 10:10:57,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118338951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:10:57,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131428580] [2022-07-22 10:10:57,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:10:57,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:10:57,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:10:57,396 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 10:10:57,405 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 10:10:57,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 10:10:57,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:10:57,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 188 conjunts are in the unsatisfiable core [2022-07-22 10:10:57,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:10:57,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:11:03,449 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 10:11:03,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2022-07-22 10:11:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 221 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 10:11:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:11:15,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131428580] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:15,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:15,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 33, 27] total 128 [2022-07-22 10:11:15,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880635659] [2022-07-22 10:11:15,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:15,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-22 10:11:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-22 10:11:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=15657, Unknown=0, NotChecked=0, Total=16256 [2022-07-22 10:11:15,680 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 128 states, 128 states have (on average 2.4609375) internal successors, (315), 128 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:31,444 INFO L93 Difference]: Finished difference Result 271 states and 293 transitions. [2022-07-22 10:11:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-07-22 10:11:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.4609375) internal successors, (315), 128 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-07-22 10:11:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:31,445 INFO L225 Difference]: With dead ends: 271 [2022-07-22 10:11:31,445 INFO L226 Difference]: Without dead ends: 267 [2022-07-22 10:11:31,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 161 SyntacticMatches, 38 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15755 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=2277, Invalid=50853, Unknown=0, NotChecked=0, Total=53130 [2022-07-22 10:11:31,450 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 4660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1692 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:31,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 287 Invalid, 4660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2685 Invalid, 0 Unknown, 1692 Unchecked, 1.6s Time] [2022-07-22 10:11:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-22 10:11:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 217. [2022-07-22 10:11:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.087962962962963) internal successors, (235), 216 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 235 transitions. [2022-07-22 10:11:31,498 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 235 transitions. Word has length 113 [2022-07-22 10:11:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:31,498 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 235 transitions. [2022-07-22 10:11:31,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.4609375) internal successors, (315), 128 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 235 transitions. [2022-07-22 10:11:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-22 10:11:31,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:31,499 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:31,516 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 10:11:31,703 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,SelfDestructingSolverStorable14 [2022-07-22 10:11:31,704 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:31,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1548943064, now seen corresponding path program 13 times [2022-07-22 10:11:31,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:31,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526380299] [2022-07-22 10:11:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:31,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-22 10:11:31,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:31,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526380299] [2022-07-22 10:11:31,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526380299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:31,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036752008] [2022-07-22 10:11:31,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:11:31,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:31,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:31,838 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 10:11:31,840 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 10:11:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:31,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:11:31,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-22 10:11:32,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-22 10:11:32,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036752008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:32,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:32,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:11:32,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895327724] [2022-07-22 10:11:32,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:32,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:11:32,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:32,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:11:32,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:11:32,265 INFO L87 Difference]: Start difference. First operand 217 states and 235 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:32,709 INFO L93 Difference]: Finished difference Result 433 states and 468 transitions. [2022-07-22 10:11:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 10:11:32,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-07-22 10:11:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:32,711 INFO L225 Difference]: With dead ends: 433 [2022-07-22 10:11:32,711 INFO L226 Difference]: Without dead ends: 194 [2022-07-22 10:11:32,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 221 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-07-22 10:11:32,712 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:32,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 102 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:11:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-22 10:11:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-07-22 10:11:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0833333333333333) internal successors, (208), 192 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 208 transitions. [2022-07-22 10:11:32,739 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 208 transitions. Word has length 115 [2022-07-22 10:11:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:32,739 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 208 transitions. [2022-07-22 10:11:32,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 208 transitions. [2022-07-22 10:11:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-22 10:11:32,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:32,741 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:32,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 10:11:32,946 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,SelfDestructingSolverStorable15 [2022-07-22 10:11:32,947 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:32,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:32,947 INFO L85 PathProgramCache]: Analyzing trace with hash 357090890, now seen corresponding path program 14 times [2022-07-22 10:11:32,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:32,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071265061] [2022-07-22 10:11:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:32,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-07-22 10:11:33,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:33,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071265061] [2022-07-22 10:11:33,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071265061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:33,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249589979] [2022-07-22 10:11:33,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:11:33,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:33,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:33,074 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 10:11:33,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 10:11:33,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:11:33,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:33,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:11:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-07-22 10:11:33,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:11:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-07-22 10:11:33,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249589979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:11:33,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:11:33,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:11:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359451830] [2022-07-22 10:11:33,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:11:33,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:11:33,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:11:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:11:33,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:11:33,362 INFO L87 Difference]: Start difference. First operand 193 states and 208 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:11:33,782 INFO L93 Difference]: Finished difference Result 293 states and 321 transitions. [2022-07-22 10:11:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 10:11:33,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-07-22 10:11:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:11:33,784 INFO L225 Difference]: With dead ends: 293 [2022-07-22 10:11:33,784 INFO L226 Difference]: Without dead ends: 140 [2022-07-22 10:11:33,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2022-07-22 10:11:33,785 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 276 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:11:33,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 37 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 10:11:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-22 10:11:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2022-07-22 10:11:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0687022900763359) internal successors, (140), 131 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 140 transitions. [2022-07-22 10:11:33,804 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 140 transitions. Word has length 117 [2022-07-22 10:11:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:11:33,804 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 140 transitions. [2022-07-22 10:11:33,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:11:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 140 transitions. [2022-07-22 10:11:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-22 10:11:33,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:11:33,805 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:11:33,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 10:11:34,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:34,008 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:11:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:11:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1520659528, now seen corresponding path program 15 times [2022-07-22 10:11:34,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:11:34,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787552777] [2022-07-22 10:11:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:11:34,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:11:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:11:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 1 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:11:42,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:11:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787552777] [2022-07-22 10:11:42,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787552777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:11:42,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255756826] [2022-07-22 10:11:42,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:11:42,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:11:42,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:11:42,357 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:11:42,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 10:11:42,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 10:11:42,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:11:42,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 234 conjunts are in the unsatisfiable core [2022-07-22 10:11:42,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:11:42,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:11:42,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:11:42,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:11:42,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:11:42,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:12:05,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:12:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:12:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:12:05,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:12:05,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:12:05,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-22 10:12:05,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 10:12:05,890 INFO L356 Elim1Store]: treesize reduction 195, result has 33.2 percent of original size [2022-07-22 10:12:05,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 9 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 209 treesize of output 129 [2022-07-22 10:12:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 6 proven. 312 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 10:12:06,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:12:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 10:12:57,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255756826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:12:57,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:12:57,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 84, 72] total 236 [2022-07-22 10:12:57,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796686836] [2022-07-22 10:12:57,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:12:57,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 236 states [2022-07-22 10:12:57,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:12:57,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 236 interpolants. [2022-07-22 10:12:57,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=52754, Unknown=1, NotChecked=0, Total=55460 [2022-07-22 10:12:57,544 INFO L87 Difference]: Start difference. First operand 132 states and 140 transitions. Second operand has 236 states, 236 states have (on average 1.5805084745762712) internal successors, (373), 236 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)