./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/ldv-regression/test25-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 09:06:42,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 09:06:42,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 09:06:42,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 09:06:42,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 09:06:42,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 09:06:42,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 09:06:42,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 09:06:42,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 09:06:42,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 09:06:42,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 09:06:42,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 09:06:42,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 09:06:42,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 09:06:42,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 09:06:42,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 09:06:42,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 09:06:42,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 09:06:42,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 09:06:42,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 09:06:42,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 09:06:42,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 09:06:42,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 09:06:42,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 09:06:42,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 09:06:42,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 09:06:42,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 09:06:42,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 09:06:42,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 09:06:42,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 09:06:42,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 09:06:42,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 09:06:42,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 09:06:42,741 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 09:06:42,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 09:06:42,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 09:06:42,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 09:06:42,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 09:06:42,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 09:06:42,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 09:06:42,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 09:06:42,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 09:06:42,777 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 09:06:42,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 09:06:42,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 09:06:42,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 09:06:42,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 09:06:42,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 09:06:42,780 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 09:06:42,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 09:06:42,781 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 09:06:42,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 09:06:42,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 09:06:42,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 09:06:42,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 09:06:42,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 09:06:42,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 09:06:42,782 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 09:06:42,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 09:06:42,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 09:06:42,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 09:06:42,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 09:06:42,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 09:06:42,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 09:06:42,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:06:42,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 09:06:42,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 09:06:42,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 09:06:42,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 09:06:42,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 09:06:42,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 09:06:42,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 09:06:42,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 [2021-08-29 09:06:43,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 09:06:43,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 09:06:43,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 09:06:43,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 09:06:43,056 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 09:06:43,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2021-08-29 09:06:43,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1aa36ef6/774b8d7bf7bc45f1b64f633e84cb0b1b/FLAG1017209c9 [2021-08-29 09:06:43,434 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 09:06:43,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2021-08-29 09:06:43,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1aa36ef6/774b8d7bf7bc45f1b64f633e84cb0b1b/FLAG1017209c9 [2021-08-29 09:06:43,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1aa36ef6/774b8d7bf7bc45f1b64f633e84cb0b1b [2021-08-29 09:06:43,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 09:06:43,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 09:06:43,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 09:06:43,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 09:06:43,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 09:06:43,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:06:43" (1/1) ... [2021-08-29 09:06:43,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362b225a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:43, skipping insertion in model container [2021-08-29 09:06:43,874 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:06:43" (1/1) ... [2021-08-29 09:06:43,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 09:06:43,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 09:06:43,993 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c[936,949] [2021-08-29 09:06:44,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:06:44,005 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 09:06:44,026 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c[936,949] [2021-08-29 09:06:44,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:06:44,040 INFO L208 MainTranslator]: Completed translation [2021-08-29 09:06:44,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44 WrapperNode [2021-08-29 09:06:44,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 09:06:44,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 09:06:44,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 09:06:44,043 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 09:06:44,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 09:06:44,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 09:06:44,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 09:06:44,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 09:06:44,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 09:06:44,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 09:06:44,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 09:06:44,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 09:06:44,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (1/1) ... [2021-08-29 09:06:44,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:06:44,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:44,154 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) [2021-08-29 09:06:44,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-29 09:06:44,181 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 [2021-08-29 09:06:44,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 09:06:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-29 09:06:44,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 09:06:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 09:06:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 09:06:44,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 09:06:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 09:06:44,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 09:06:44,346 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 09:06:44,346 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-29 09:06:44,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:44 BoogieIcfgContainer [2021-08-29 09:06:44,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 09:06:44,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 09:06:44,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 09:06:44,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 09:06:44,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:06:43" (1/3) ... [2021-08-29 09:06:44,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acadf6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:06:44, skipping insertion in model container [2021-08-29 09:06:44,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:44" (2/3) ... [2021-08-29 09:06:44,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acadf6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:06:44, skipping insertion in model container [2021-08-29 09:06:44,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:44" (3/3) ... [2021-08-29 09:06:44,363 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2021-08-29 09:06:44,367 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 09:06:44,367 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 09:06:44,397 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 09:06:44,401 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 09:06:44,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 09:06:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 09:06:44,412 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:44,412 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:44,413 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2021-08-29 09:06:44,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:44,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168089975] [2021-08-29 09:06:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:44,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:44,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:44,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168089975] [2021-08-29 09:06:44,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168089975] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:44,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:44,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 09:06:44,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179251950] [2021-08-29 09:06:44,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 09:06:44,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 09:06:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:06:44,643 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-08-29 09:06:44,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:44,709 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2021-08-29 09:06:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 09:06:44,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2021-08-29 09:06:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:44,718 INFO L225 Difference]: With dead ends: 32 [2021-08-29 09:06:44,718 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 09:06:44,720 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.78ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 09:06:44,722 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.44ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:44,723 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 55.44ms Time] [2021-08-29 09:06:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 09:06:44,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-08-29 09:06:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-08-29 09:06:44,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-29 09:06:44,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-08-29 09:06:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:44,744 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-29 09:06:44,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-08-29 09:06:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-29 09:06:44,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-29 09:06:44,744 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:44,745 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:44,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 09:06:44,745 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2021-08-29 09:06:44,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:44,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241987573] [2021-08-29 09:06:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:44,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:44,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:44,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241987573] [2021-08-29 09:06:44,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241987573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:44,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104882147] [2021-08-29 09:06:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:44,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:44,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:44,817 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) [2021-08-29 09:06:44,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 09:06:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-29 09:06:44,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:45,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:45,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104882147] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:45,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:45,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-08-29 09:06:45,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831423441] [2021-08-29 09:06:45,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 09:06:45,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 09:06:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-29 09:06:45,082 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-08-29 09:06:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:45,136 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-08-29 09:06:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 09:06:45,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) Word has length 13 [2021-08-29 09:06:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:45,137 INFO L225 Difference]: With dead ends: 29 [2021-08-29 09:06:45,137 INFO L226 Difference]: Without dead ends: 20 [2021-08-29 09:06:45,137 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.38ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-29 09:06:45,138 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.50ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.21ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:45,139 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.50ms Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 47.21ms Time] [2021-08-29 09:06:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-29 09:06:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-29 09:06:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2021-08-29 09:06:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-29 09:06:45,146 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2021-08-29 09:06:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:45,146 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-29 09:06:45,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-08-29 09:06:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-29 09:06:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 09:06:45,147 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:45,147 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:45,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 09:06:45,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:45,351 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:45,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 2 times [2021-08-29 09:06:45,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:45,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125343021] [2021-08-29 09:06:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:45,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:45,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:45,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125343021] [2021-08-29 09:06:45,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125343021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:45,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994398188] [2021-08-29 09:06:45,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:06:45,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:45,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:45,427 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) [2021-08-29 09:06:45,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 09:06:45,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-29 09:06:45,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:06:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 09:06:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:45,605 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-29 09:06:45,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2021-08-29 09:06:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-29 09:06:45,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-29 09:06:45,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994398188] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:45,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-29 09:06:45,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-08-29 09:06:45,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830575759] [2021-08-29 09:06:45,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 09:06:45,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 09:06:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-29 09:06:45,630 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-08-29 09:06:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:45,663 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-29 09:06:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 09:06:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 19 [2021-08-29 09:06:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:45,666 INFO L225 Difference]: With dead ends: 27 [2021-08-29 09:06:45,666 INFO L226 Difference]: Without dead ends: 22 [2021-08-29 09:06:45,666 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 37.33ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-29 09:06:45,669 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 24.01ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:45,670 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 51 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 13 Unchecked, 24.01ms Time] [2021-08-29 09:06:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-29 09:06:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-29 09:06:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-29 09:06:45,675 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-08-29 09:06:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:45,675 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-29 09:06:45,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-08-29 09:06:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-29 09:06:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 09:06:45,676 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:45,676 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:45,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 09:06:45,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-29 09:06:45,893 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:45,894 INFO L82 PathProgramCache]: Analyzing trace with hash 903742421, now seen corresponding path program 1 times [2021-08-29 09:06:45,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:45,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722916040] [2021-08-29 09:06:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:45,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 09:06:45,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:45,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722916040] [2021-08-29 09:06:45,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722916040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:45,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173317898] [2021-08-29 09:06:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:45,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:45,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:45,992 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) [2021-08-29 09:06:45,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 09:06:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 09:06:46,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 09:06:46,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-29 09:06:46,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173317898] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:46,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:46,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-08-29 09:06:46,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746853748] [2021-08-29 09:06:46,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 09:06:46,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 09:06:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:06:46,153 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2021-08-29 09:06:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:46,220 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-08-29 09:06:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-29 09:06:46,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 21 [2021-08-29 09:06:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:46,221 INFO L225 Difference]: With dead ends: 45 [2021-08-29 09:06:46,221 INFO L226 Difference]: Without dead ends: 34 [2021-08-29 09:06:46,222 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 41.76ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-29 09:06:46,223 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.78ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:46,223 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [9 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 53.78ms Time] [2021-08-29 09:06:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-29 09:06:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-29 09:06:46,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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) [2021-08-29 09:06:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-08-29 09:06:46,230 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 21 [2021-08-29 09:06:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:46,230 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-08-29 09:06:46,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2021-08-29 09:06:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-08-29 09:06:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-29 09:06:46,232 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:46,232 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:46,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 09:06:46,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:46,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash -926636855, now seen corresponding path program 2 times [2021-08-29 09:06:46,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:46,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601028139] [2021-08-29 09:06:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:46,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 09:06:48,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:48,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601028139] [2021-08-29 09:06:48,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601028139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490362447] [2021-08-29 09:06:48,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:06:48,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:48,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:48,304 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) [2021-08-29 09:06:48,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 09:06:48,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 09:06:48,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:06:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-29 09:06:48,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:48,789 INFO L354 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2021-08-29 09:06:48,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2021-08-29 09:06:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 09:06:48,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:48,886 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-08-29 09:06:48,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-29 09:06:48,935 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 09:06:48,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490362447] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:48,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:48,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 6] total 35 [2021-08-29 09:06:48,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646129217] [2021-08-29 09:06:48,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-29 09:06:48,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-29 09:06:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-08-29 09:06:48,937 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:49,452 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-08-29 09:06:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-29 09:06:49,453 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-29 09:06:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:49,453 INFO L225 Difference]: With dead ends: 45 [2021-08-29 09:06:49,454 INFO L226 Difference]: Without dead ends: 40 [2021-08-29 09:06:49,454 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 656.45ms TimeCoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2021-08-29 09:06:49,455 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 327.51ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:49,455 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 650 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [15 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 327.51ms Time] [2021-08-29 09:06:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-29 09:06:49,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-29 09:06:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-08-29 09:06:49,461 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2021-08-29 09:06:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:49,461 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-08-29 09:06:49,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-08-29 09:06:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-29 09:06:49,462 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:49,462 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:49,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 09:06:49,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:49,677 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:49,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1546516264, now seen corresponding path program 3 times [2021-08-29 09:06:49,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:49,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855598848] [2021-08-29 09:06:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:49,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 20 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 09:06:51,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:51,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855598848] [2021-08-29 09:06:51,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855598848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:51,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890446405] [2021-08-29 09:06:51,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 09:06:51,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:51,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:51,161 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) [2021-08-29 09:06:51,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 09:06:51,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-29 09:06:51,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:06:51,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-29 09:06:51,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:51,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-29 09:06:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 09:06:51,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:51,563 INFO L354 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2021-08-29 09:06:51,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-08-29 09:06:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-29 09:06:51,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890446405] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:51,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:51,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 27 [2021-08-29 09:06:51,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860342955] [2021-08-29 09:06:51,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-29 09:06:51,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:51,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-29 09:06:51,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-08-29 09:06:51,593 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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) [2021-08-29 09:06:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:51,967 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-08-29 09:06:51,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-29 09:06:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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 39 [2021-08-29 09:06:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:51,968 INFO L225 Difference]: With dead ends: 57 [2021-08-29 09:06:51,968 INFO L226 Difference]: Without dead ends: 52 [2021-08-29 09:06:51,969 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 477.03ms TimeCoverageRelationStatistics Valid=260, Invalid=1072, Unknown=0, NotChecked=0, Total=1332 [2021-08-29 09:06:51,969 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.88ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:51,970 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [10 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 205.88ms Time] [2021-08-29 09:06:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-29 09:06:51,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-29 09:06:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 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) [2021-08-29 09:06:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-08-29 09:06:51,974 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 39 [2021-08-29 09:06:51,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:51,974 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-08-29 09:06:51,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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) [2021-08-29 09:06:51,974 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-08-29 09:06:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-29 09:06:51,975 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:51,975 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:51,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 09:06:52,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:52,181 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash 562473782, now seen corresponding path program 4 times [2021-08-29 09:06:52,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:52,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921456799] [2021-08-29 09:06:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:52,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 09:06:52,225 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 09:06:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 09:06:52,272 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 09:06:52,272 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 09:06:52,273 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 09:06:52,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-29 09:06:52,278 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 09:06:52,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:06:52 BoogieIcfgContainer [2021-08-29 09:06:52,304 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 09:06:52,304 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 09:06:52,304 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 09:06:52,304 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 09:06:52,305 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:44" (3/4) ... [2021-08-29 09:06:52,306 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 09:06:52,336 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 09:06:52,336 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 09:06:52,337 INFO L158 Benchmark]: Toolchain (without parser) took 8468.99ms. Allocated memory was 60.8MB in the beginning and 237.0MB in the end (delta: 176.2MB). Free memory was 41.8MB in the beginning and 152.2MB in the end (delta: -110.4MB). Peak memory consumption was 65.1MB. Max. memory is 16.1GB. [2021-08-29 09:06:52,337 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 60.8MB. Free memory was 43.1MB in the beginning and 43.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:06:52,337 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.72ms. Allocated memory is still 60.8MB. Free memory was 41.6MB in the beginning and 31.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 09:06:52,337 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.53ms. Allocated memory is still 60.8MB. Free memory was 31.7MB in the beginning and 44.2MB in the end (delta: -12.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 09:06:52,338 INFO L158 Benchmark]: Boogie Preprocessor took 32.10ms. Allocated memory is still 60.8MB. Free memory was 44.2MB in the beginning and 42.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:06:52,338 INFO L158 Benchmark]: RCFGBuilder took 222.16ms. Allocated memory is still 60.8MB. Free memory was 42.8MB in the beginning and 33.1MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 09:06:52,338 INFO L158 Benchmark]: TraceAbstraction took 7955.14ms. Allocated memory was 60.8MB in the beginning and 237.0MB in the end (delta: 176.2MB). Free memory was 32.6MB in the beginning and 156.4MB in the end (delta: -123.8MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. [2021-08-29 09:06:52,338 INFO L158 Benchmark]: Witness Printer took 32.10ms. Allocated memory is still 237.0MB. Free memory was 156.4MB in the beginning and 152.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 09:06:52,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 60.8MB. Free memory was 43.1MB in the beginning and 43.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 171.72ms. Allocated memory is still 60.8MB. Free memory was 41.6MB in the beginning and 31.8MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.53ms. Allocated memory is still 60.8MB. Free memory was 31.7MB in the beginning and 44.2MB in the end (delta: -12.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.10ms. Allocated memory is still 60.8MB. Free memory was 44.2MB in the beginning and 42.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 222.16ms. Allocated memory is still 60.8MB. Free memory was 42.8MB in the beginning and 33.1MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 7955.14ms. Allocated memory was 60.8MB in the beginning and 237.0MB in the end (delta: 176.2MB). Free memory was 32.6MB in the beginning and 156.4MB in the end (delta: -123.8MB). Peak memory consumption was 53.7MB. Max. memory is 16.1GB. * Witness Printer took 32.10ms. Allocated memory is still 237.0MB. Free memory was 156.4MB in the beginning and 152.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 47]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND FALSE !(j < 10) [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND FALSE !(i < *pa) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] COND TRUE !check(&cont, i) [L47] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7881.44ms, OverallIterations: 7, TraceHistogramMax: 11, EmptinessCheckTime: 8.75ms, AutomataDifference: 1166.84ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 5.57ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 713.83ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 57 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 580.84ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 13 IncrementalHoareTripleChecker+Unchecked, 225 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1195 IncrementalHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 0 mSDtfsCounter, 1195 mSolverCounterSat, 7.58ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 302 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1248.73ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=6, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 36.76ms AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.61ms SsaConstructionTime, 623.39ms SatisfiabilityAnalysisTime, 4598.82ms InterpolantComputationTime, 311 NumberOfCodeBlocks, 291 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 351 ConstructedInterpolants, 1 QuantifiedInterpolants, 2147 SizeOfPredicates, 33 NumberOfNonLiveVariables, 728 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 365/755 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 09:06:52,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...