./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_sum_const4.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 e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:57:19,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:57:19,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:57:19,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:57:19,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:57:19,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:57:19,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:57:19,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:57:19,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:57:19,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:57:19,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:57:19,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:57:19,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:57:19,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:57:19,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:57:19,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:57:19,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:57:19,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:57:19,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:57:19,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:57:19,242 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:57:19,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:57:19,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:57:19,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:57:19,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:57:19,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:57:19,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:57:19,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:57:19,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:57:19,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:57:19,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:57:19,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:57:19,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:57:19,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:57:19,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:57:19,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:57:19,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:57:19,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:57:19,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:57:19,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:57:19,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:57:19,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:57:19,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:57:19,292 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:57:19,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:57:19,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:57:19,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:57:19,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:57:19,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:57:19,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:57:19,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:57:19,295 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:57:19,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:57:19,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:57:19,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:57:19,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:57:19,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:57:19,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:57:19,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:57:19,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:57:19,298 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:57:19,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:57:19,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:57:19,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:57:19,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:57:19,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:57:19,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:57:19,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:57:19,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:57:19,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:57:19,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:57:19,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:57:19,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:57:19,301 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:57:19,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:57:19,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:57:19,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e61c61c9ffe0a2031cf5a0964b1882adcc5bdae1b7345aeaf1c374f155ad9e78 [2022-07-19 09:57:19,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:57:19,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:57:19,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:57:19,539 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:57:19,540 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:57:19,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const4.c [2022-07-19 09:57:19,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37ca3c7b/667797ca4be64cde8f7fe21cb05bef75/FLAGb32ee8740 [2022-07-19 09:57:19,988 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:57:19,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const4.c [2022-07-19 09:57:19,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37ca3c7b/667797ca4be64cde8f7fe21cb05bef75/FLAGb32ee8740 [2022-07-19 09:57:20,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37ca3c7b/667797ca4be64cde8f7fe21cb05bef75 [2022-07-19 09:57:20,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:57:20,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:57:20,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:57:20,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:57:20,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:57:20,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e097d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20, skipping insertion in model container [2022-07-19 09:57:20,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:57:20,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:57:20,591 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_sum_const4.c[406,419] [2022-07-19 09:57:20,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:57:20,633 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:57:20,642 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_sum_const4.c[406,419] [2022-07-19 09:57:20,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:57:20,661 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:57:20,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20 WrapperNode [2022-07-19 09:57:20,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:57:20,662 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:57:20,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:57:20,662 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:57:20,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,691 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2022-07-19 09:57:20,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:57:20,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:57:20,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:57:20,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:57:20,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:57:20,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:57:20,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:57:20,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:57:20,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (1/1) ... [2022-07-19 09:57:20,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:57:20,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:20,753 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) [2022-07-19 09:57:20,755 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 [2022-07-19 09:57:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:57:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:57:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:57:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:57:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:57:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:57:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:57:20,842 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:57:20,843 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:57:20,998 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:57:21,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:57:21,004 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-19 09:57:21,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:57:21 BoogieIcfgContainer [2022-07-19 09:57:21,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:57:21,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:57:21,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:57:21,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:57:21,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:57:20" (1/3) ... [2022-07-19 09:57:21,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfca4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:57:21, skipping insertion in model container [2022-07-19 09:57:21,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:57:20" (2/3) ... [2022-07-19 09:57:21,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfca4fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:57:21, skipping insertion in model container [2022-07-19 09:57:21,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:57:21" (3/3) ... [2022-07-19 09:57:21,013 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2022-07-19 09:57:21,026 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:57:21,027 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:57:21,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:57:21,072 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@7c60809a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e00b379 [2022-07-19 09:57:21,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:57:21,076 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) [2022-07-19 09:57:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 09:57:21,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:21,082 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] [2022-07-19 09:57:21,083 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2022-07-19 09:57:21,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:21,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642104085] [2022-07-19 09:57:21,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:21,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:21,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:21,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642104085] [2022-07-19 09:57:21,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642104085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:57:21,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:57:21,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:57:21,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596985456] [2022-07-19 09:57:21,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:57:21,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:57:21,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:57:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:57:21,317 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) [2022-07-19 09:57:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:21,343 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2022-07-19 09:57:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:57:21,345 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 [2022-07-19 09:57:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:21,352 INFO L225 Difference]: With dead ends: 71 [2022-07-19 09:57:21,353 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 09:57:21,362 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 [2022-07-19 09:57:21,370 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 [2022-07-19 09:57:21,372 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] [2022-07-19 09:57:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 09:57:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-19 09:57:21,402 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) [2022-07-19 09:57:21,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-19 09:57:21,404 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2022-07-19 09:57:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:21,405 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-19 09:57:21,405 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) [2022-07-19 09:57:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-19 09:57:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 09:57:21,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:21,407 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] [2022-07-19 09:57:21,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:57:21,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2022-07-19 09:57:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:21,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840042401] [2022-07-19 09:57:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:21,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:21,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:21,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840042401] [2022-07-19 09:57:21,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840042401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:57:21,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:57:21,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:57:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949904156] [2022-07-19 09:57:21,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:57:21,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:57:21,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:21,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:57:21,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:57:21,494 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) [2022-07-19 09:57:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:21,550 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-07-19 09:57:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:57:21,551 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 [2022-07-19 09:57:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:21,551 INFO L225 Difference]: With dead ends: 63 [2022-07-19 09:57:21,552 INFO L226 Difference]: Without dead ends: 35 [2022-07-19 09:57:21,552 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 [2022-07-19 09:57:21,554 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:21,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:57:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-19 09:57:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-07-19 09:57:21,559 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) [2022-07-19 09:57:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-07-19 09:57:21,560 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2022-07-19 09:57:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:21,560 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-07-19 09:57:21,561 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) [2022-07-19 09:57:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-07-19 09:57:21,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 09:57:21,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:21,562 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] [2022-07-19 09:57:21,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:57:21,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2022-07-19 09:57:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:21,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117632480] [2022-07-19 09:57:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 09:57:21,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117632480] [2022-07-19 09:57:21,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117632480] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:57:21,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:57:21,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:57:21,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419712680] [2022-07-19 09:57:21,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:57:21,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:57:21,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:57:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:57:21,613 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) [2022-07-19 09:57:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:21,723 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2022-07-19 09:57:21,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 09:57:21,724 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 [2022-07-19 09:57:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:21,724 INFO L225 Difference]: With dead ends: 76 [2022-07-19 09:57:21,725 INFO L226 Difference]: Without dead ends: 51 [2022-07-19 09:57:21,725 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 [2022-07-19 09:57:21,726 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:21,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:57:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-19 09:57:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2022-07-19 09:57:21,737 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) [2022-07-19 09:57:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-07-19 09:57:21,740 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2022-07-19 09:57:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:21,740 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-07-19 09:57:21,741 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) [2022-07-19 09:57:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-07-19 09:57:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 09:57:21,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:21,743 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] [2022-07-19 09:57:21,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 09:57:21,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2022-07-19 09:57:21,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:21,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915235460] [2022-07-19 09:57:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:21,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 09:57:21,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:21,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915235460] [2022-07-19 09:57:21,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915235460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202893306] [2022-07-19 09:57:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:21,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:21,859 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) [2022-07-19 09:57:21,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:57:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:57:21,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 09:57:22,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 09:57:22,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202893306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:22,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:22,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 09:57:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18495144] [2022-07-19 09:57:22,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:22,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 09:57:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 09:57:22,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:57:22,134 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) [2022-07-19 09:57:22,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:22,254 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-07-19 09:57:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:57:22,255 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 [2022-07-19 09:57:22,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:22,258 INFO L225 Difference]: With dead ends: 81 [2022-07-19 09:57:22,258 INFO L226 Difference]: Without dead ends: 45 [2022-07-19 09:57:22,260 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 [2022-07-19 09:57:22,267 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:22,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:57:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-19 09:57:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-07-19 09:57:22,277 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) [2022-07-19 09:57:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-07-19 09:57:22,278 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2022-07-19 09:57:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:22,278 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-07-19 09:57:22,278 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) [2022-07-19 09:57:22,279 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-07-19 09:57:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 09:57:22,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:22,280 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] [2022-07-19 09:57:22,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 09:57:22,491 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 [2022-07-19 09:57:22,492 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2022-07-19 09:57:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:22,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010128185] [2022-07-19 09:57:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:22,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:57:22,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:22,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010128185] [2022-07-19 09:57:22,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010128185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:22,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811632350] [2022-07-19 09:57:22,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:57:22,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:22,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:22,609 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) [2022-07-19 09:57:22,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:57:22,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:57:22,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:22,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:57:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:57:22,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:57:22,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811632350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:22,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:22,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-19 09:57:22,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204059173] [2022-07-19 09:57:22,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:22,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 09:57:22,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:22,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 09:57:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-19 09:57:22,850 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) [2022-07-19 09:57:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:23,006 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2022-07-19 09:57:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 09:57:23,007 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 [2022-07-19 09:57:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:23,009 INFO L225 Difference]: With dead ends: 101 [2022-07-19 09:57:23,010 INFO L226 Difference]: Without dead ends: 69 [2022-07-19 09:57:23,010 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 [2022-07-19 09:57:23,011 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:23,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 20 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:57:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-19 09:57:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2022-07-19 09:57:23,029 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) [2022-07-19 09:57:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-07-19 09:57:23,030 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2022-07-19 09:57:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:23,031 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-07-19 09:57:23,031 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) [2022-07-19 09:57:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-07-19 09:57:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 09:57:23,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:23,035 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] [2022-07-19 09:57:23,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:57:23,242 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 [2022-07-19 09:57:23,242 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2022-07-19 09:57:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504042724] [2022-07-19 09:57:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:24,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504042724] [2022-07-19 09:57:24,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504042724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763312180] [2022-07-19 09:57:24,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:57:24,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:24,520 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) [2022-07-19 09:57:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:57:24,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:57:24,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-19 09:57:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:26,391 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:57:26,392 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 26 treesize of output 29 [2022-07-19 09:57:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:26,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:37,225 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:57:37,225 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 [2022-07-19 09:57:37,467 INFO L356 Elim1Store]: treesize reduction 40, result has 52.9 percent of original size [2022-07-19 09:57:37,467 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 53 [2022-07-19 09:57:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:38,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763312180] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:38,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:38,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 28] total 68 [2022-07-19 09:57:38,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581700016] [2022-07-19 09:57:38,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:38,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-19 09:57:38,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-19 09:57:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4080, Unknown=2, NotChecked=0, Total=4556 [2022-07-19 09:57:38,094 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 68 states, 68 states have (on average 2.485294117647059) internal successors, (169), 68 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) [2022-07-19 09:57:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:41,782 INFO L93 Difference]: Finished difference Result 210 states and 244 transitions. [2022-07-19 09:57:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-19 09:57:41,783 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.485294117647059) internal successors, (169), 68 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 [2022-07-19 09:57:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:41,785 INFO L225 Difference]: With dead ends: 210 [2022-07-19 09:57:41,786 INFO L226 Difference]: Without dead ends: 206 [2022-07-19 09:57:41,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 76 SyntacticMatches, 39 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 5450 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1351, Invalid=12927, Unknown=2, NotChecked=0, Total=14280 [2022-07-19 09:57:41,791 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 832 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:41,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 93 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 531 Invalid, 0 Unknown, 832 Unchecked, 0.4s Time] [2022-07-19 09:57:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-19 09:57:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 101. [2022-07-19 09:57:41,806 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) [2022-07-19 09:57:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2022-07-19 09:57:41,807 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2022-07-19 09:57:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:41,808 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2022-07-19 09:57:41,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.485294117647059) internal successors, (169), 68 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) [2022-07-19 09:57:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2022-07-19 09:57:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 09:57:41,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:41,809 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] [2022-07-19 09:57:41,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:57:42,023 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 [2022-07-19 09:57:42,024 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:42,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:42,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2022-07-19 09:57:42,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:42,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979280755] [2022-07-19 09:57:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 09:57:42,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:42,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979280755] [2022-07-19 09:57:42,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979280755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:42,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292312065] [2022-07-19 09:57:42,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:57:42,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:42,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:42,123 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) [2022-07-19 09:57:42,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:57:42,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:57:42,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:42,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:57:42,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 09:57:42,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 09:57:42,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292312065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:42,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:42,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 09:57:42,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909629855] [2022-07-19 09:57:42,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:42,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:57:42,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:42,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:57:42,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:57:42,322 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) [2022-07-19 09:57:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:42,605 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2022-07-19 09:57:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 09:57:42,605 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 [2022-07-19 09:57:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:42,606 INFO L225 Difference]: With dead ends: 233 [2022-07-19 09:57:42,606 INFO L226 Difference]: Without dead ends: 136 [2022-07-19 09:57:42,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:57:42,607 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 183 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:42,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 44 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:57:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-19 09:57:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2022-07-19 09:57:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.135135135135135) internal successors, (126), 111 states have internal predecessors, (126), 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) [2022-07-19 09:57:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2022-07-19 09:57:42,625 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 61 [2022-07-19 09:57:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:42,625 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2022-07-19 09:57:42,626 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) [2022-07-19 09:57:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2022-07-19 09:57:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 09:57:42,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:42,627 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] [2022-07-19 09:57:42,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:57:42,831 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 [2022-07-19 09:57:42,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:42,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:42,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1506179060, now seen corresponding path program 5 times [2022-07-19 09:57:42,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:42,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448793055] [2022-07-19 09:57:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 09:57:42,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:42,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448793055] [2022-07-19 09:57:42,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448793055] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:42,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104844489] [2022-07-19 09:57:42,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:57:42,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:42,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:42,926 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) [2022-07-19 09:57:42,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:57:43,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 09:57:43,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:43,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:57:43,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 09:57:43,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:57:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 09:57:43,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104844489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:57:43,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:57:43,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 09:57:43,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181455708] [2022-07-19 09:57:43,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:57:43,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:57:43,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:57:43,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:57:43,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:57:43,186 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2022-07-19 09:57:43,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:57:43,444 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2022-07-19 09:57:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 09:57:43,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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 [2022-07-19 09:57:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:57:43,445 INFO L225 Difference]: With dead ends: 126 [2022-07-19 09:57:43,445 INFO L226 Difference]: Without dead ends: 86 [2022-07-19 09:57:43,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:57:43,446 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 185 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:57:43,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 25 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:57:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-19 09:57:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-07-19 09:57:43,452 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) [2022-07-19 09:57:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-07-19 09:57:43,453 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2022-07-19 09:57:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:57:43,453 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-07-19 09:57:43,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2022-07-19 09:57:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-07-19 09:57:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 09:57:43,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:57:43,458 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] [2022-07-19 09:57:43,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:57:43,671 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 [2022-07-19 09:57:43,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:57:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:57:43,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2022-07-19 09:57:43,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:57:43,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703670990] [2022-07-19 09:57:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:57:43,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:57:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:57:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:47,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:57:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703670990] [2022-07-19 09:57:47,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703670990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:57:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97100230] [2022-07-19 09:57:47,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:57:47,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:57:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:57:47,526 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) [2022-07-19 09:57:47,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:57:47,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 09:57:47,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:57:47,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-19 09:57:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:57:52,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:57:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:57:52,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:57:52,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:57:52,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:57:52,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 09:57:52,070 INFO L356 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2022-07-19 09:57:52,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 28 [2022-07-19 09:57:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:57:52,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:58:52,328 INFO L356 Elim1Store]: treesize reduction 185, result has 55.3 percent of original size [2022-07-19 09:58:52,328 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 245 [2022-07-19 09:58:55,198 INFO L356 Elim1Store]: treesize reduction 393, result has 5.1 percent of original size [2022-07-19 09:58:55,198 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 38 [2022-07-19 09:58:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:58:55,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97100230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:58:55,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:58:55,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 47, 41] total 133 [2022-07-19 09:58:55,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888885430] [2022-07-19 09:58:55,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:58:55,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-07-19 09:58:55,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:58:55,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-07-19 09:58:55,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1104, Invalid=16434, Unknown=18, NotChecked=0, Total=17556 [2022-07-19 09:58:55,813 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 133 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 133 states have internal predecessors, (216), 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) [2022-07-19 10:00:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:00:32,014 INFO L93 Difference]: Finished difference Result 198 states and 221 transitions. [2022-07-19 10:00:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-19 10:00:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 133 states have internal predecessors, (216), 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 [2022-07-19 10:00:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:00:32,019 INFO L225 Difference]: With dead ends: 198 [2022-07-19 10:00:32,019 INFO L226 Difference]: Without dead ends: 194 [2022-07-19 10:00:32,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 70 SyntacticMatches, 31 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16054 ImplicationChecksByTransitivity, 160.5s TimeCoverageRelationStatistics Valid=2665, Invalid=43322, Unknown=23, NotChecked=0, Total=46010 [2022-07-19 10:00:32,026 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1609 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:00:32,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 207 Invalid, 2763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1028 Invalid, 0 Unknown, 1609 Unchecked, 0.7s Time] [2022-07-19 10:00:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-19 10:00:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 131. [2022-07-19 10:00:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.123076923076923) internal successors, (146), 130 states have internal predecessors, (146), 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) [2022-07-19 10:00:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2022-07-19 10:00:32,044 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 77 [2022-07-19 10:00:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:00:32,045 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2022-07-19 10:00:32,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 133 states have internal predecessors, (216), 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) [2022-07-19 10:00:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2022-07-19 10:00:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 10:00:32,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:00:32,046 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] [2022-07-19 10:00:32,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:00:32,259 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 [2022-07-19 10:00:32,260 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:00:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:00:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2022-07-19 10:00:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:00:32,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313406814] [2022-07-19 10:00:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:00:32,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:00:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:00:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 10:00:32,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:00:32,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313406814] [2022-07-19 10:00:32,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313406814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:00:32,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893708901] [2022-07-19 10:00:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:00:32,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:00:32,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:00:32,356 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) [2022-07-19 10:00:32,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:00:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:00:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:00:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:00:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 10:00:32,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:00:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 10:00:32,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893708901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:00:32,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:00:32,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 10:00:32,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806623405] [2022-07-19 10:00:32,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:00:32,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 10:00:32,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:00:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 10:00:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:00:32,647 INFO L87 Difference]: Start difference. First operand 131 states and 146 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) [2022-07-19 10:00:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:00:33,065 INFO L93 Difference]: Finished difference Result 293 states and 328 transitions. [2022-07-19 10:00:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:00:33,066 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 [2022-07-19 10:00:33,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:00:33,067 INFO L225 Difference]: With dead ends: 293 [2022-07-19 10:00:33,067 INFO L226 Difference]: Without dead ends: 166 [2022-07-19 10:00:33,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-19 10:00:33,068 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 222 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:00:33,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 44 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:00:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-19 10:00:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 142. [2022-07-19 10:00:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1063829787234043) internal successors, (156), 141 states have internal predecessors, (156), 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) [2022-07-19 10:00:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2022-07-19 10:00:33,077 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 79 [2022-07-19 10:00:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:00:33,078 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2022-07-19 10:00:33,078 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) [2022-07-19 10:00:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2022-07-19 10:00:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 10:00:33,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:00:33,079 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] [2022-07-19 10:00:33,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:00:33,280 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 [2022-07-19 10:00:33,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:00:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:00:33,281 INFO L85 PathProgramCache]: Analyzing trace with hash 385815078, now seen corresponding path program 8 times [2022-07-19 10:00:33,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:00:33,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616928249] [2022-07-19 10:00:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:00:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:00:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:00:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 10:00:33,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:00:33,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616928249] [2022-07-19 10:00:33,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616928249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:00:33,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042387410] [2022-07-19 10:00:33,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:00:33,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:00:33,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:00:33,368 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) [2022-07-19 10:00:33,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:00:33,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:00:33,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:00:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 10:00:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:00:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 10:00:33,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:00:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 10:00:33,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042387410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:00:33,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:00:33,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 10:00:33,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76858309] [2022-07-19 10:00:33,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:00:33,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 10:00:33,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:00:33,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 10:00:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-19 10:00:33,565 INFO L87 Difference]: Start difference. First operand 142 states and 156 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) [2022-07-19 10:00:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:00:33,945 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2022-07-19 10:00:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:00:33,946 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 [2022-07-19 10:00:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:00:33,947 INFO L225 Difference]: With dead ends: 156 [2022-07-19 10:00:33,947 INFO L226 Difference]: Without dead ends: 104 [2022-07-19 10:00:33,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-07-19 10:00:33,948 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 196 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:00:33,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 27 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:00:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-19 10:00:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2022-07-19 10:00:33,954 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) [2022-07-19 10:00:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-07-19 10:00:33,955 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2022-07-19 10:00:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:00:33,955 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-07-19 10:00:33,955 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) [2022-07-19 10:00:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-07-19 10:00:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 10:00:33,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:00:33,955 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] [2022-07-19 10:00:33,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:00:34,156 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 [2022-07-19 10:00:34,157 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:00:34,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:00:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2022-07-19 10:00:34,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:00:34,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390916319] [2022-07-19 10:00:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:00:34,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:00:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:00:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 3 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:00:39,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:00:39,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390916319] [2022-07-19 10:00:39,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390916319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:00:39,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986905928] [2022-07-19 10:00:39,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:00:39,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:00:39,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:00:39,981 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) [2022-07-19 10:00:39,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:00:40,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 10:00:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:00:40,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 154 conjunts are in the unsatisfiable core [2022-07-19 10:00:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:00:40,137 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 [2022-07-19 10:00:45,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:45,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 10:00:45,958 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:00:45,958 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 38 treesize of output 53 [2022-07-19 10:00:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 5 proven. 135 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 10:00:46,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:00:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 10:00:53,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986905928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:00:53,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:00:53,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 26, 21] total 105 [2022-07-19 10:00:53,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276974551] [2022-07-19 10:00:53,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:00:53,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-19 10:00:53,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:00:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-19 10:00:53,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=10344, Unknown=0, NotChecked=0, Total=10920 [2022-07-19 10:00:53,612 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 105 states, 105 states have (on average 2.5619047619047617) internal successors, (269), 105 states have internal predecessors, (269), 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) [2022-07-19 10:01:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:01:11,979 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2022-07-19 10:01:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-07-19 10:01:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.5619047619047617) internal successors, (269), 105 states have internal predecessors, (269), 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 [2022-07-19 10:01:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:01:11,980 INFO L225 Difference]: With dead ends: 215 [2022-07-19 10:01:11,980 INFO L226 Difference]: Without dead ends: 211 [2022-07-19 10:01:11,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 117 SyntacticMatches, 56 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16728 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=3121, Invalid=43319, Unknown=0, NotChecked=0, Total=46440 [2022-07-19 10:01:11,984 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 2978 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 4978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 2978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1471 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:01:11,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 240 Invalid, 4978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 2978 Invalid, 0 Unknown, 1471 Unchecked, 2.0s Time] [2022-07-19 10:01:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-19 10:01:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 141. [2022-07-19 10:01:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1) internal successors, (154), 140 states have internal predecessors, (154), 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) [2022-07-19 10:01:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2022-07-19 10:01:12,001 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 95 [2022-07-19 10:01:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:01:12,001 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2022-07-19 10:01:12,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.5619047619047617) internal successors, (269), 105 states have internal predecessors, (269), 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) [2022-07-19 10:01:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2022-07-19 10:01:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-19 10:01:12,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:01:12,003 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] [2022-07-19 10:01:12,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 10:01:12,215 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 [2022-07-19 10:01:12,216 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:01:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:01:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1175667574, now seen corresponding path program 10 times [2022-07-19 10:01:12,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:01:12,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077297706] [2022-07-19 10:01:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:01:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:01:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:01:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 10:01:12,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:01:12,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077297706] [2022-07-19 10:01:12,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077297706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:01:12,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312535543] [2022-07-19 10:01:12,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:01:12,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:01:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:01:12,323 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) [2022-07-19 10:01:12,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:01:12,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:01:12,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:01:12,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 10:01:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:01:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 10:01:12,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:01:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 10:01:12,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312535543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:01:12,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:01:12,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 10:01:12,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502998400] [2022-07-19 10:01:12,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:01:12,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:01:12,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:01:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:01:12,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:01:12,666 INFO L87 Difference]: Start difference. First operand 141 states and 154 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) [2022-07-19 10:01:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:01:13,096 INFO L93 Difference]: Finished difference Result 378 states and 416 transitions. [2022-07-19 10:01:13,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:01:13,097 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 [2022-07-19 10:01:13,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:01:13,097 INFO L225 Difference]: With dead ends: 378 [2022-07-19 10:01:13,098 INFO L226 Difference]: Without dead ends: 174 [2022-07-19 10:01:13,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-07-19 10:01:13,099 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 308 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:01:13,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 47 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:01:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-07-19 10:01:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 152. [2022-07-19 10:01:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.086092715231788) internal successors, (164), 151 states have internal predecessors, (164), 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) [2022-07-19 10:01:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2022-07-19 10:01:13,114 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 97 [2022-07-19 10:01:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:01:13,114 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2022-07-19 10:01:13,114 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) [2022-07-19 10:01:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2022-07-19 10:01:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 10:01:13,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:01:13,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-07-19 10:01:13,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:01:13,331 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 [2022-07-19 10:01:13,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:01:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:01:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash 302616284, now seen corresponding path program 11 times [2022-07-19 10:01:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:01:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438629439] [2022-07-19 10:01:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:01:13,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:01:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:01:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-19 10:01:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:01:13,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438629439] [2022-07-19 10:01:13,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438629439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:01:13,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325930294] [2022-07-19 10:01:13,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:01:13,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:01:13,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:01:13,443 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) [2022-07-19 10:01:13,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:01:13,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 10:01:13,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:01:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 10:01:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:01:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-19 10:01:13,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:01:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-19 10:01:13,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325930294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:01:13,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:01:13,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 10:01:13,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907083284] [2022-07-19 10:01:13,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:01:13,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 10:01:13,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:01:13,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 10:01:13,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:01:13,863 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 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) [2022-07-19 10:01:14,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:01:14,266 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2022-07-19 10:01:14,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 10:01:14,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 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 103 [2022-07-19 10:01:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:01:14,268 INFO L225 Difference]: With dead ends: 166 [2022-07-19 10:01:14,268 INFO L226 Difference]: Without dead ends: 122 [2022-07-19 10:01:14,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-07-19 10:01:14,269 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 201 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:01:14,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 27 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:01:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-19 10:01:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2022-07-19 10:01:14,279 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) [2022-07-19 10:01:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-07-19 10:01:14,280 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 103 [2022-07-19 10:01:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:01:14,280 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-07-19 10:01:14,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 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) [2022-07-19 10:01:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-07-19 10:01:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 10:01:14,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:01:14,281 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] [2022-07-19 10:01:14,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:01:14,491 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 [2022-07-19 10:01:14,492 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:01:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:01:14,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1362635270, now seen corresponding path program 12 times [2022-07-19 10:01:14,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:01:14,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954951463] [2022-07-19 10:01:14,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:01:14,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:01:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:01:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 8 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:01:23,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:01:23,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954951463] [2022-07-19 10:01:23,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954951463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:01:23,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255303150] [2022-07-19 10:01:23,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:01:23,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:01:23,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:01:23,040 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) [2022-07-19 10:01:23,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:01:23,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 10:01:23,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:01:23,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 186 conjunts are in the unsatisfiable core [2022-07-19 10:01:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:01:29,669 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 10:01:29,669 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 17 treesize of output 18 [2022-07-19 10:01:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 221 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:01:30,061 INFO L328 TraceCheckSpWp]: Computing backward predicates...