./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-examples/standard_maxInArray_ground.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 418a605fc1323c67278586b967efb51b918569726e40c2a0630b64c1083a6ff9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:44:09,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:44:09,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:44:09,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:44:09,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:44:09,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:44:09,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:44:09,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:44:09,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:44:09,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:44:09,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:44:09,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:44:09,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:44:09,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:44:09,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:44:09,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:44:09,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:44:09,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:44:09,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:44:09,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:44:09,645 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:44:09,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:44:09,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:44:09,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:44:09,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:44:09,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:44:09,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:44:09,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:44:09,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:44:09,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:44:09,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:44:09,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:44:09,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:44:09,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:44:09,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:44:09,662 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:44:09,662 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:44:09,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:44:09,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:44:09,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:44:09,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:44:09,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:44:09,666 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:44:09,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:44:09,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:44:09,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:44:09,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:44:09,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:44:09,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:44:09,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:44:09,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:44:09,701 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:44:09,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:44:09,702 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:44:09,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:44:09,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:44:09,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:44:09,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:44:09,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:44:09,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:44:09,703 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:44:09,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:44:09,704 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:44:09,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:44:09,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:44:09,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:44:09,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:44:09,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:44:09,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:44:09,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:44:09,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:44:09,705 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:44:09,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:44:09,706 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:44:09,706 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:44:09,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:44:09,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 418a605fc1323c67278586b967efb51b918569726e40c2a0630b64c1083a6ff9 [2022-07-20 20:44:09,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:44:09,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:44:09,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:44:09,936 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:44:09,936 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:44:09,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2022-07-20 20:44:09,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1301f81d/6535334f84fe4ec7b8d83dcd2d7ada49/FLAG49ff1809a [2022-07-20 20:44:10,369 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:44:10,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_maxInArray_ground.i [2022-07-20 20:44:10,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1301f81d/6535334f84fe4ec7b8d83dcd2d7ada49/FLAG49ff1809a [2022-07-20 20:44:10,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1301f81d/6535334f84fe4ec7b8d83dcd2d7ada49 [2022-07-20 20:44:10,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:44:10,796 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:44:10,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:44:10,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:44:10,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:44:10,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:44:10" (1/1) ... [2022-07-20 20:44:10,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9459d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:10, skipping insertion in model container [2022-07-20 20:44:10,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:44:10" (1/1) ... [2022-07-20 20:44:10,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:44:10,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:44:11,006 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-examples/standard_maxInArray_ground.i[819,832] [2022-07-20 20:44:11,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:44:11,032 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:44:11,051 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-examples/standard_maxInArray_ground.i[819,832] [2022-07-20 20:44:11,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:44:11,076 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:44:11,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11 WrapperNode [2022-07-20 20:44:11,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:44:11,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:44:11,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:44:11,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:44:11,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,111 INFO L137 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-07-20 20:44:11,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:44:11,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:44:11,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:44:11,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:44:11,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:44:11,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:44:11,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:44:11,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:44:11,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (1/1) ... [2022-07-20 20:44:11,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:44:11,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:11,189 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) [2022-07-20 20:44:11,195 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 [2022-07-20 20:44:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:44:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:44:11,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:44:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:44:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:44:11,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:44:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:44:11,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:44:11,273 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:44:11,274 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:44:11,365 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:44:11,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:44:11,371 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 20:44:11,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:44:11 BoogieIcfgContainer [2022-07-20 20:44:11,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:44:11,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:44:11,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:44:11,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:44:11,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:44:10" (1/3) ... [2022-07-20 20:44:11,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6bfb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:44:11, skipping insertion in model container [2022-07-20 20:44:11,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:44:11" (2/3) ... [2022-07-20 20:44:11,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6bfb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:44:11, skipping insertion in model container [2022-07-20 20:44:11,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:44:11" (3/3) ... [2022-07-20 20:44:11,394 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_maxInArray_ground.i [2022-07-20 20:44:11,406 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:44:11,417 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:44:11,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:44:11,512 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@473820e7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@586f2307 [2022-07-20 20:44:11,512 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:44:11,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2022-07-20 20:44:11,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 20:44:11,531 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:11,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:11,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:11,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:11,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2022-07-20 20:44:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:11,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728083105] [2022-07-20 20:44:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:11,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:44:11,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:11,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728083105] [2022-07-20 20:44:11,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728083105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:44:11,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:44:11,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:44:11,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64328996] [2022-07-20 20:44:11,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:44:11,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:44:11,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:11,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:44:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:44:11,779 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-20 20:44:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:11,826 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-07-20 20:44:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:44:11,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-07-20 20:44:11,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:11,836 INFO L225 Difference]: With dead ends: 36 [2022-07-20 20:44:11,837 INFO L226 Difference]: Without dead ends: 17 [2022-07-20 20:44:11,843 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 [2022-07-20 20:44:11,849 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:11,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:44:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-20 20:44:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-07-20 20:44:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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) [2022-07-20 20:44:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-20 20:44:11,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-07-20 20:44:11,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:11,886 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-20 20:44:11,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-20 20:44:11,887 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-20 20:44:11,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 20:44:11,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:11,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:11,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:44:11,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1565753620, now seen corresponding path program 1 times [2022-07-20 20:44:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:11,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195980385] [2022-07-20 20:44:11,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:11,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:44:11,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195980385] [2022-07-20 20:44:11,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195980385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:11,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784183468] [2022-07-20 20:44:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:11,967 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) [2022-07-20 20:44:11,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:44:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:12,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 20:44:12,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:44:12,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 20:44:12,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784183468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:44:12,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 20:44:12,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-20 20:44:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945250945] [2022-07-20 20:44:12,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:44:12,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:44:12,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:44:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:44:12,063 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-20 20:44:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:12,084 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-07-20 20:44:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:44:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-07-20 20:44:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:12,087 INFO L225 Difference]: With dead ends: 26 [2022-07-20 20:44:12,090 INFO L226 Difference]: Without dead ends: 19 [2022-07-20 20:44:12,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:44:12,093 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:12,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:44:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-20 20:44:12,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-07-20 20:44:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-07-20 20:44:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-20 20:44:12,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-07-20 20:44:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:12,106 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-20 20:44:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-20 20:44:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-20 20:44:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 20:44:12,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:12,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:12,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:12,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:12,324 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:12,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2022-07-20 20:44:12,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:12,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291053778] [2022-07-20 20:44:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:12,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:44:12,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291053778] [2022-07-20 20:44:12,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291053778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632079231] [2022-07-20 20:44:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:12,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:12,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:12,376 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) [2022-07-20 20:44:12,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:44:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:44:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:44:12,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:44:12,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632079231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:12,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:12,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:44:12,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634621422] [2022-07-20 20:44:12,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:12,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:44:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:44:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:44:12,508 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-07-20 20:44:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:12,545 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-07-20 20:44:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:44:12,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 14 [2022-07-20 20:44:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:12,546 INFO L225 Difference]: With dead ends: 35 [2022-07-20 20:44:12,547 INFO L226 Difference]: Without dead ends: 23 [2022-07-20 20:44:12,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:44:12,549 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:12,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:44:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-20 20:44:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-20 20:44:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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) [2022-07-20 20:44:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-20 20:44:12,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-07-20 20:44:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:12,555 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-20 20:44:12,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-07-20 20:44:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-20 20:44:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 20:44:12,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:12,557 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:12,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:12,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-20 20:44:12,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2025336791, now seen corresponding path program 2 times [2022-07-20 20:44:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:12,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150303098] [2022-07-20 20:44:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 20:44:12,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:12,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150303098] [2022-07-20 20:44:12,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150303098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:12,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512451265] [2022-07-20 20:44:12,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:44:12,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:12,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:12,855 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) [2022-07-20 20:44:12,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:44:12,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:44:12,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:44:12,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:44:12,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:44:12,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:44:13,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512451265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:13,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:13,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-20 20:44:13,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019638439] [2022-07-20 20:44:13,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:13,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 20:44:13,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 20:44:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 20:44:13,051 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2022-07-20 20:44:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:13,115 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-07-20 20:44:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 20:44:13,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 20 [2022-07-20 20:44:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:13,117 INFO L225 Difference]: With dead ends: 52 [2022-07-20 20:44:13,117 INFO L226 Difference]: Without dead ends: 40 [2022-07-20 20:44:13,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 20:44:13,119 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:13,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:44:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-20 20:44:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-07-20 20:44:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 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) [2022-07-20 20:44:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-07-20 20:44:13,125 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 20 [2022-07-20 20:44:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:13,126 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-07-20 20:44:13,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2022-07-20 20:44:13,127 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-07-20 20:44:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 20:44:13,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:13,128 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:13,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:13,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:13,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:13,348 INFO L85 PathProgramCache]: Analyzing trace with hash -930592990, now seen corresponding path program 3 times [2022-07-20 20:44:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:13,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276075250] [2022-07-20 20:44:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:13,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 20:44:13,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276075250] [2022-07-20 20:44:13,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276075250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:13,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015111440] [2022-07-20 20:44:13,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:44:13,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:13,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:13,574 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) [2022-07-20 20:44:13,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:44:13,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 20:44:13,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:44:13,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 20:44:13,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 20:44:13,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 20:44:13,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015111440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:13,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:13,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-20 20:44:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296862991] [2022-07-20 20:44:13,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 20:44:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 20:44:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 20:44:13,781 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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) [2022-07-20 20:44:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:13,878 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2022-07-20 20:44:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 20:44:13,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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) Word has length 35 [2022-07-20 20:44:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:13,879 INFO L225 Difference]: With dead ends: 68 [2022-07-20 20:44:13,879 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 20:44:13,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 20:44:13,880 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:13,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 67 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:44:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 20:44:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-20 20:44:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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) [2022-07-20 20:44:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-07-20 20:44:13,888 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 35 [2022-07-20 20:44:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:13,888 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-07-20 20:44:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 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) [2022-07-20 20:44:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-07-20 20:44:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 20:44:13,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:13,890 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:13,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:14,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:14,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1920246112, now seen corresponding path program 4 times [2022-07-20 20:44:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:14,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703403011] [2022-07-20 20:44:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:14,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:44:14,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703403011] [2022-07-20 20:44:14,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703403011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:14,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264429674] [2022-07-20 20:44:14,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:44:14,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:14,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:14,258 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) [2022-07-20 20:44:14,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:44:14,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:44:14,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:44:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 20:44:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:44:14,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:44:14,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264429674] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:14,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:14,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-20 20:44:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73964781] [2022-07-20 20:44:14,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 20:44:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 20:44:14,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-20 20:44:14,639 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-07-20 20:44:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:14,712 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2022-07-20 20:44:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 20:44:14,713 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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 49 [2022-07-20 20:44:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:14,714 INFO L225 Difference]: With dead ends: 105 [2022-07-20 20:44:14,714 INFO L226 Difference]: Without dead ends: 78 [2022-07-20 20:44:14,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-20 20:44:14,715 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:14,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 44 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:44:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-20 20:44:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-20 20:44:14,723 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) [2022-07-20 20:44:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-07-20 20:44:14,724 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 49 [2022-07-20 20:44:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:14,724 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-07-20 20:44:14,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-07-20 20:44:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-07-20 20:44:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 20:44:14,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:14,726 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:14,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:14,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:14,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1287758790, now seen corresponding path program 5 times [2022-07-20 20:44:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:14,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449613723] [2022-07-20 20:44:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:14,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:44:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:15,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449613723] [2022-07-20 20:44:15,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449613723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:15,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222133843] [2022-07-20 20:44:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:44:15,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:15,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:15,395 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) [2022-07-20 20:44:15,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 20:44:15,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-20 20:44:15,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:44:15,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 20:44:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:44:16,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:44:16,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222133843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:16,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:16,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-20 20:44:16,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667789992] [2022-07-20 20:44:16,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:16,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 20:44:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 20:44:16,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:44:16,813 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-07-20 20:44:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:16,975 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2022-07-20 20:44:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 20:44:16,976 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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 75 [2022-07-20 20:44:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:16,979 INFO L225 Difference]: With dead ends: 157 [2022-07-20 20:44:16,979 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 20:44:16,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:44:16,981 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:16,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 114 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:44:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 20:44:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-20 20:44:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.069767441860465) internal successors, (138), 129 states have internal predecessors, (138), 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) [2022-07-20 20:44:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2022-07-20 20:44:17,001 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 75 [2022-07-20 20:44:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:17,001 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2022-07-20 20:44:17,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-07-20 20:44:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2022-07-20 20:44:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 20:44:17,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:17,008 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:17,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:17,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:17,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:17,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1463270510, now seen corresponding path program 6 times [2022-07-20 20:44:17,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:17,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297230521] [2022-07-20 20:44:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:17,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:44:18,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:18,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297230521] [2022-07-20 20:44:18,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297230521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:18,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424812775] [2022-07-20 20:44:18,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:44:18,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:18,356 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) [2022-07-20 20:44:18,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 20:44:18,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-20 20:44:18,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:44:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 20:44:18,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-07-20 20:44:18,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-07-20 20:44:18,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424812775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:18,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:18,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2022-07-20 20:44:18,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235380361] [2022-07-20 20:44:18,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:18,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-20 20:44:18,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-20 20:44:18,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 20:44:18,963 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 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) [2022-07-20 20:44:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:19,154 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2022-07-20 20:44:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-20 20:44:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 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) Word has length 127 [2022-07-20 20:44:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:19,156 INFO L225 Difference]: With dead ends: 184 [2022-07-20 20:44:19,156 INFO L226 Difference]: Without dead ends: 157 [2022-07-20 20:44:19,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 20:44:19,159 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:19,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 64 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:44:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-20 20:44:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-07-20 20:44:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1096774193548387) internal successors, (172), 155 states have internal predecessors, (172), 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) [2022-07-20 20:44:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2022-07-20 20:44:19,168 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 127 [2022-07-20 20:44:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:19,169 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2022-07-20 20:44:19,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.328358208955224) internal successors, (156), 67 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) [2022-07-20 20:44:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2022-07-20 20:44:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-07-20 20:44:19,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:19,171 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:19,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:19,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:19,381 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1124380112, now seen corresponding path program 7 times [2022-07-20 20:44:19,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:19,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687985014] [2022-07-20 20:44:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:19,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:44:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687985014] [2022-07-20 20:44:20,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687985014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:20,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090713501] [2022-07-20 20:44:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:44:20,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:20,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:20,552 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) [2022-07-20 20:44:20,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 20:44:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:20,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 20:44:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:44:20,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:44:23,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090713501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:23,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:23,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-07-20 20:44:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947932210] [2022-07-20 20:44:23,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:23,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-20 20:44:23,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-20 20:44:23,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 20:44:23,641 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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) [2022-07-20 20:44:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:23,910 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2022-07-20 20:44:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-20 20:44:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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 153 [2022-07-20 20:44:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:23,912 INFO L225 Difference]: With dead ends: 313 [2022-07-20 20:44:23,912 INFO L226 Difference]: Without dead ends: 262 [2022-07-20 20:44:23,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 20:44:23,915 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:23,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 72 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:44:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-20 20:44:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-07-20 20:44:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.0651340996168583) internal successors, (278), 261 states have internal predecessors, (278), 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) [2022-07-20 20:44:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 278 transitions. [2022-07-20 20:44:23,934 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 278 transitions. Word has length 153 [2022-07-20 20:44:23,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:23,935 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 278 transitions. [2022-07-20 20:44:23,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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) [2022-07-20 20:44:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 278 transitions. [2022-07-20 20:44:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-07-20 20:44:23,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:23,938 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:23,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:24,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-20 20:44:24,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2002911398, now seen corresponding path program 8 times [2022-07-20 20:44:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:24,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658917953] [2022-07-20 20:44:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:24,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:44:27,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:27,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658917953] [2022-07-20 20:44:27,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658917953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:27,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739741019] [2022-07-20 20:44:27,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:44:27,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:27,978 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) [2022-07-20 20:44:27,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 20:44:28,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:44:28,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:44:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-20 20:44:28,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:44:28,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:44:38,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739741019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:38,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:38,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2022-07-20 20:44:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948796112] [2022-07-20 20:44:38,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:38,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-07-20 20:44:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:38,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-07-20 20:44:38,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-20 20:44:38,725 INFO L87 Difference]: Start difference. First operand 262 states and 278 transitions. Second operand has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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) [2022-07-20 20:44:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:39,564 INFO L93 Difference]: Finished difference Result 525 states and 662 transitions. [2022-07-20 20:44:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-07-20 20:44:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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 259 [2022-07-20 20:44:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:39,568 INFO L225 Difference]: With dead ends: 525 [2022-07-20 20:44:39,568 INFO L226 Difference]: Without dead ends: 474 [2022-07-20 20:44:39,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-20 20:44:39,573 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 210 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:39,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 100 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 20:44:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-20 20:44:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2022-07-20 20:44:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 1.0359408033826638) internal successors, (490), 473 states have internal predecessors, (490), 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) [2022-07-20 20:44:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 490 transitions. [2022-07-20 20:44:39,587 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 490 transitions. Word has length 259 [2022-07-20 20:44:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:39,588 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 490 transitions. [2022-07-20 20:44:39,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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) [2022-07-20 20:44:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 490 transitions. [2022-07-20 20:44:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2022-07-20 20:44:39,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:39,595 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:39,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:39,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 20:44:39,812 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash -523881518, now seen corresponding path program 9 times [2022-07-20 20:44:39,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:39,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362678079] [2022-07-20 20:44:39,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:39,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:44:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:44:53,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:44:53,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362678079] [2022-07-20 20:44:53,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362678079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:44:53,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399645190] [2022-07-20 20:44:53,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:44:53,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:44:53,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:44:53,536 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) [2022-07-20 20:44:53,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 20:44:53,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-20 20:44:53,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:44:53,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 20:44:53,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:44:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2022-07-20 20:44:55,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:44:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2022-07-20 20:44:56,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399645190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:44:56,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:44:56,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2022-07-20 20:44:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058093666] [2022-07-20 20:44:56,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:44:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2022-07-20 20:44:56,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:44:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2022-07-20 20:44:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2022-07-20 20:44:56,300 INFO L87 Difference]: Start difference. First operand 474 states and 490 transitions. Second operand has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 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) [2022-07-20 20:44:57,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:44:57,257 INFO L93 Difference]: Finished difference Result 576 states and 640 transitions. [2022-07-20 20:44:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-07-20 20:44:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 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 471 [2022-07-20 20:44:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:44:57,262 INFO L225 Difference]: With dead ends: 576 [2022-07-20 20:44:57,263 INFO L226 Difference]: Without dead ends: 525 [2022-07-20 20:44:57,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1153 GetRequests, 912 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6300 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2022-07-20 20:44:57,268 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 362 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 20:44:57,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 151 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 20:44:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-20 20:44:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 524. [2022-07-20 20:44:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.0630975143403443) internal successors, (556), 523 states have internal predecessors, (556), 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) [2022-07-20 20:44:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 556 transitions. [2022-07-20 20:44:57,282 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 556 transitions. Word has length 471 [2022-07-20 20:44:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:44:57,283 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 556 transitions. [2022-07-20 20:44:57,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.156378600823045) internal successors, (524), 243 states have internal predecessors, (524), 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) [2022-07-20 20:44:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 556 transitions. [2022-07-20 20:44:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-07-20 20:44:57,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:44:57,292 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:44:57,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 20:44:57,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 20:44:57,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:44:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:44:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash 968252304, now seen corresponding path program 10 times [2022-07-20 20:44:57,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:44:57,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258435551] [2022-07-20 20:44:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:44:57,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:44:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-07-20 20:45:11,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:11,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258435551] [2022-07-20 20:45:11,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258435551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:11,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756031691] [2022-07-20 20:45:11,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:45:11,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:11,466 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) [2022-07-20 20:45:11,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 20:45:11,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:45:11,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 2192 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 20:45:11,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 44521 trivial. 0 not checked. [2022-07-20 20:45:14,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 44521 trivial. 0 not checked. [2022-07-20 20:45:17,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756031691] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:17,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:17,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 33, 33] total 276 [2022-07-20 20:45:17,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859031520] [2022-07-20 20:45:17,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:17,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 276 states [2022-07-20 20:45:17,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 276 interpolants. [2022-07-20 20:45:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24806, Invalid=51094, Unknown=0, NotChecked=0, Total=75900 [2022-07-20 20:45:17,233 INFO L87 Difference]: Start difference. First operand 524 states and 556 transitions. Second operand has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 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) [2022-07-20 20:45:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:18,384 INFO L93 Difference]: Finished difference Result 722 states and 850 transitions. [2022-07-20 20:45:18,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-07-20 20:45:18,385 INFO L78 Accepts]: Start accepts. Automaton has has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 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 521 [2022-07-20 20:45:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:18,388 INFO L225 Difference]: With dead ends: 722 [2022-07-20 20:45:18,388 INFO L226 Difference]: Without dead ends: 623 [2022-07-20 20:45:18,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1254 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13082 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=24806, Invalid=51094, Unknown=0, NotChecked=0, Total=75900 [2022-07-20 20:45:18,393 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 548 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:18,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 227 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 20:45:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-07-20 20:45:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 622. [2022-07-20 20:45:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 1.104669887278583) internal successors, (686), 621 states have internal predecessors, (686), 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) [2022-07-20 20:45:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 686 transitions. [2022-07-20 20:45:18,408 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 686 transitions. Word has length 521 [2022-07-20 20:45:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:18,409 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 686 transitions. [2022-07-20 20:45:18,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 276 states, 276 states have (on average 2.253623188405797) internal successors, (622), 276 states have internal predecessors, (622), 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) [2022-07-20 20:45:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 686 transitions. [2022-07-20 20:45:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-07-20 20:45:18,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:18,421 INFO L195 NwaCegarLoop]: trace histogram [212, 212, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:18,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 20:45:18,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1096007374, now seen corresponding path program 11 times [2022-07-20 20:45:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:18,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925730073] [2022-07-20 20:45:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50679 backedges. 0 proven. 44944 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-07-20 20:45:32,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:32,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925730073] [2022-07-20 20:45:32,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925730073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:32,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547623529] [2022-07-20 20:45:32,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:45:32,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:32,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:32,740 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) [2022-07-20 20:45:32,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process