./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test23-2.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/test23-2.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 b5a3ee374ac0f96e3c60321b5f69e75eb8e7b4b2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 09:06:25,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 09:06:25,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 09:06:25,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 09:06:25,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 09:06:25,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 09:06:25,839 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 09:06:25,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 09:06:25,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 09:06:25,842 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 09:06:25,843 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 09:06:25,844 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 09:06:25,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 09:06:25,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 09:06:25,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 09:06:25,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 09:06:25,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 09:06:25,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 09:06:25,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 09:06:25,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 09:06:25,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 09:06:25,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 09:06:25,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 09:06:25,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 09:06:25,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 09:06:25,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 09:06:25,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 09:06:25,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 09:06:25,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 09:06:25,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 09:06:25,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 09:06:25,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 09:06:25,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 09:06:25,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 09:06:25,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 09:06:25,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 09:06:25,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 09:06:25,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 09:06:25,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 09:06:25,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 09:06:25,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 09:06:25,869 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 09:06:25,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 09:06:25,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 09:06:25,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 09:06:25,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 09:06:25,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 09:06:25,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 09:06:25,884 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 09:06:25,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 09:06:25,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 09:06:25,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 09:06:25,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 09:06:25,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 09:06:25,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 09:06:25,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 09:06:25,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 09:06:25,886 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 09:06:25,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 09:06:25,886 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 09:06:25,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 09:06:25,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 09:06:25,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 09:06:25,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 09:06:25,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:06:25,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 09:06:25,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 09:06:25,887 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 09:06:25,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 09:06:25,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 09:06:25,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 09:06:25,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 09:06:25,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5a3ee374ac0f96e3c60321b5f69e75eb8e7b4b2 [2021-08-29 09:06:26,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 09:06:26,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 09:06:26,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 09:06:26,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 09:06:26,162 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 09:06:26,163 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test23-2.c [2021-08-29 09:06:26,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e87e93e/98e38f68a4514a41b0345f4d92613c29/FLAG66abeae5b [2021-08-29 09:06:26,547 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 09:06:26,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-2.c [2021-08-29 09:06:26,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e87e93e/98e38f68a4514a41b0345f4d92613c29/FLAG66abeae5b [2021-08-29 09:06:26,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e87e93e/98e38f68a4514a41b0345f4d92613c29 [2021-08-29 09:06:26,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 09:06:26,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 09:06:26,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 09:06:26,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 09:06:26,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 09:06:26,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:06:26" (1/1) ... [2021-08-29 09:06:26,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7df202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:26, skipping insertion in model container [2021-08-29 09:06:26,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 09:06:26" (1/1) ... [2021-08-29 09:06:27,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 09:06:27,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 09:06:27,139 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/test23-2.c[1070,1083] [2021-08-29 09:06:27,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:06:27,153 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 09:06:27,186 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/test23-2.c[1070,1083] [2021-08-29 09:06:27,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 09:06:27,201 INFO L208 MainTranslator]: Completed translation [2021-08-29 09:06:27,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27 WrapperNode [2021-08-29 09:06:27,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 09:06:27,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 09:06:27,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 09:06:27,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 09:06:27,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 09:06:27,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 09:06:27,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 09:06:27,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 09:06:27,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 09:06:27,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 09:06:27,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 09:06:27,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 09:06:27,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (1/1) ... [2021-08-29 09:06:27,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 09:06:27,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:27,296 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 09:06:27,312 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 09:06:27,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 09:06:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 09:06:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 09:06:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 09:06:27,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 09:06:27,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 09:06:27,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 09:06:27,470 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-29 09:06:27,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:27 BoogieIcfgContainer [2021-08-29 09:06:27,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 09:06:27,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 09:06:27,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 09:06:27,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 09:06:27,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 09:06:26" (1/3) ... [2021-08-29 09:06:27,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d601c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:06:27, skipping insertion in model container [2021-08-29 09:06:27,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 09:06:27" (2/3) ... [2021-08-29 09:06:27,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d601c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 09:06:27, skipping insertion in model container [2021-08-29 09:06:27,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:27" (3/3) ... [2021-08-29 09:06:27,475 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-2.c [2021-08-29 09:06:27,478 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 09:06:27,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 09:06:27,519 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 09:06:27,525 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 09:06:27,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 09:06:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 09:06:27,539 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:27,540 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:27,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:27,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2021-08-29 09:06:27,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:27,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024534204] [2021-08-29 09:06:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:27,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:27,716 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 09:06:27,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:27,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024534204] [2021-08-29 09:06:27,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024534204] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:27,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:27,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 09:06:27,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415441965] [2021-08-29 09:06:27,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 09:06:27,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 09:06:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:06:27,746 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 09:06:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:27,808 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-08-29 09:06:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 09:06:27,810 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) Word has length 15 [2021-08-29 09:06:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:27,824 INFO L225 Difference]: With dead ends: 30 [2021-08-29 09:06:27,824 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 09:06:27,826 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 09:06:27,828 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.57ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:27,828 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 24 Unknown, 0 Unchecked, 0.21ms Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 51.57ms Time] [2021-08-29 09:06:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 09:06:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-29 09:06:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-29 09:06:27,846 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2021-08-29 09:06:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:27,847 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-29 09:06:27,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 09:06:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-29 09:06:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:06:27,848 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:27,848 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:27,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 09:06:27,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2021-08-29 09:06:27,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:27,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581065814] [2021-08-29 09:06:27,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:27,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:28,041 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 09:06:28,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:28,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581065814] [2021-08-29 09:06:28,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581065814] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:28,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:28,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-29 09:06:28,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231943089] [2021-08-29 09:06:28,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 09:06:28,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 09:06:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-29 09:06:28,044 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 09:06:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:28,385 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-08-29 09:06:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-29 09:06:28,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 16 [2021-08-29 09:06:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:28,387 INFO L225 Difference]: With dead ends: 59 [2021-08-29 09:06:28,388 INFO L226 Difference]: Without dead ends: 54 [2021-08-29 09:06:28,391 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 224.33ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-08-29 09:06:28,392 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.03ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 144.67ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:28,392 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 6.03ms Time], IncrementalHoareTripleChecker [16 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 144.67ms Time] [2021-08-29 09:06:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-29 09:06:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 25. [2021-08-29 09:06:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 09:06:28,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-29 09:06:28,404 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-29 09:06:28,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:28,404 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-29 09:06:28,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 09:06:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-29 09:06:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:06:28,407 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:28,408 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:28,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 09:06:28,409 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash -108238562, now seen corresponding path program 1 times [2021-08-29 09:06:28,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:28,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525861487] [2021-08-29 09:06:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:28,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:28,507 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 09:06:28,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:28,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525861487] [2021-08-29 09:06:28,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525861487] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:28,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:28,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-29 09:06:28,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149862553] [2021-08-29 09:06:28,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 09:06:28,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 09:06:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-29 09:06:28,510 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 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 09:06:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:28,690 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-08-29 09:06:28,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 09:06:28,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 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 16 [2021-08-29 09:06:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:28,700 INFO L225 Difference]: With dead ends: 54 [2021-08-29 09:06:28,700 INFO L226 Difference]: Without dead ends: 44 [2021-08-29 09:06:28,701 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 77.75ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-29 09:06:28,702 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.22ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.12ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:28,702 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 0 Invalid, 226 Unknown, 0 Unchecked, 1.22ms Time], IncrementalHoareTripleChecker [4 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 116.12ms Time] [2021-08-29 09:06:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-29 09:06:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2021-08-29 09:06:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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 09:06:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-08-29 09:06:28,706 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2021-08-29 09:06:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:28,706 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-29 09:06:28,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 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 09:06:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-08-29 09:06:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 09:06:28,721 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:28,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:28,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 09:06:28,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash -501265572, now seen corresponding path program 1 times [2021-08-29 09:06:28,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:28,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142889302] [2021-08-29 09:06:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:28,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:28,892 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 09:06:28,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:28,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142889302] [2021-08-29 09:06:28,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142889302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:28,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:28,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-29 09:06:28,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222058817] [2021-08-29 09:06:28,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 09:06:28,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 09:06:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-29 09:06:28,894 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 09:06:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:29,124 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-08-29 09:06:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 09:06:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 16 [2021-08-29 09:06:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:29,127 INFO L225 Difference]: With dead ends: 51 [2021-08-29 09:06:29,127 INFO L226 Difference]: Without dead ends: 46 [2021-08-29 09:06:29,128 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 165.00ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-29 09:06:29,130 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.00ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.64ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:29,130 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 327 Unknown, 0 Unchecked, 2.00ms Time], IncrementalHoareTripleChecker [6 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 121.64ms Time] [2021-08-29 09:06:29,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-29 09:06:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 22. [2021-08-29 09:06:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 09:06:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-29 09:06:29,134 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-08-29 09:06:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-29 09:06:29,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 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 09:06:29,135 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-08-29 09:06:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 09:06:29,135 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:29,135 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:29,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 09:06:29,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:29,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1851619425, now seen corresponding path program 1 times [2021-08-29 09:06:29,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:29,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681503140] [2021-08-29 09:06:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:29,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:29,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:29,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681503140] [2021-08-29 09:06:29,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681503140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:29,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918429857] [2021-08-29 09:06:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:29,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:29,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:29,283 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 09:06:29,312 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 09:06:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:29,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-29 09:06:29,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:29,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2021-08-29 09:06:29,816 INFO L354 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2021-08-29 09:06:29,817 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 78 treesize of output 41 [2021-08-29 09:06:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:29,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:29,888 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 52 treesize of output 43 [2021-08-29 09:06:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:30,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918429857] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:30,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:30,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2021-08-29 09:06:30,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389658066] [2021-08-29 09:06:30,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-29 09:06:30,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:30,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-29 09:06:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-08-29 09:06:30,075 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:30,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:30,365 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-08-29 09:06:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-29 09:06:30,366 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-29 09:06:30,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:30,366 INFO L225 Difference]: With dead ends: 41 [2021-08-29 09:06:30,366 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 09:06:30,367 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 478.93ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-08-29 09:06:30,367 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 111.65ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:30,368 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 322 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [15 Valid, 300 Invalid, 0 Unknown, 7 Unchecked, 111.65ms Time] [2021-08-29 09:06:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 09:06:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2021-08-29 09:06:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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 09:06:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-29 09:06:30,371 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2021-08-29 09:06:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:30,371 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-29 09:06:30,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 09:06:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-29 09:06:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 09:06:30,372 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:30,372 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:30,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 09:06:30,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:30,572 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:30,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1013708501, now seen corresponding path program 2 times [2021-08-29 09:06:30,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:30,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045821721] [2021-08-29 09:06:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:30,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:30,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:30,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045821721] [2021-08-29 09:06:30,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045821721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:30,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891579136] [2021-08-29 09:06:30,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:06:30,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:30,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:30,749 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 09:06:30,750 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 09:06:30,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 09:06:30,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:06:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-29 09:06:30,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:30,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2021-08-29 09:06:31,239 INFO L354 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2021-08-29 09:06:31,239 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 75 treesize of output 38 [2021-08-29 09:06:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:31,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:31,360 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 52 treesize of output 43 [2021-08-29 09:06:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:31,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891579136] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:31,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:31,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2021-08-29 09:06:31,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331016268] [2021-08-29 09:06:31,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-29 09:06:31,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:31,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-29 09:06:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-08-29 09:06:31,547 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 37 states have internal predecessors, (55), 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 09:06:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:31,995 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-08-29 09:06:31,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-29 09:06:31,995 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 37 states have internal predecessors, (55), 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 22 [2021-08-29 09:06:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:31,996 INFO L225 Difference]: With dead ends: 54 [2021-08-29 09:06:31,996 INFO L226 Difference]: Without dead ends: 49 [2021-08-29 09:06:31,997 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 739.51ms TimeCoverageRelationStatistics Valid=401, Invalid=2251, Unknown=0, NotChecked=0, Total=2652 [2021-08-29 09:06:31,997 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 111.77ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:31,998 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 338 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [18 Valid, 292 Invalid, 0 Unknown, 28 Unchecked, 111.77ms Time] [2021-08-29 09:06:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-29 09:06:32,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2021-08-29 09:06:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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 09:06:32,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-08-29 09:06:32,002 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 22 [2021-08-29 09:06:32,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:32,002 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-08-29 09:06:32,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 37 states have internal predecessors, (55), 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 09:06:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-08-29 09:06:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-29 09:06:32,003 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:32,003 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:32,021 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 09:06:32,204 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,SelfDestructingSolverStorable5 [2021-08-29 09:06:32,205 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:32,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:32,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1043903553, now seen corresponding path program 3 times [2021-08-29 09:06:32,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:32,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743445361] [2021-08-29 09:06:32,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:32,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:32,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:32,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743445361] [2021-08-29 09:06:32,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743445361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:32,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526348692] [2021-08-29 09:06:32,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 09:06:32,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:32,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:32,393 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 09:06:32,393 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 09:06:32,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-29 09:06:32,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:06:32,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-29 09:06:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:32,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-08-29 09:06:33,154 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-08-29 09:06:33,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 58 [2021-08-29 09:06:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-29 09:06:33,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:33,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 09:06:33,510 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 129 treesize of output 131 [2021-08-29 09:06:33,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 36 [2021-08-29 09:06:33,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 09:06:33,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 114 treesize of output 111 [2021-08-29 09:06:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-29 09:06:33,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526348692] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:33,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:33,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 43 [2021-08-29 09:06:33,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850629262] [2021-08-29 09:06:33,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-29 09:06:33,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-29 09:06:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2021-08-29 09:06:33,879 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 09:06:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:35,104 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-08-29 09:06:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-29 09:06:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 30 [2021-08-29 09:06:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:35,105 INFO L225 Difference]: With dead ends: 69 [2021-08-29 09:06:35,105 INFO L226 Difference]: Without dead ends: 40 [2021-08-29 09:06:35,106 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1707.26ms TimeCoverageRelationStatistics Valid=683, Invalid=4429, Unknown=0, NotChecked=0, Total=5112 [2021-08-29 09:06:35,107 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 126.94ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:35,107 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [16 Valid, 321 Invalid, 0 Unknown, 32 Unchecked, 126.94ms Time] [2021-08-29 09:06:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-29 09:06:35,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-08-29 09:06:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 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 09:06:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-29 09:06:35,111 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2021-08-29 09:06:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:35,111 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-29 09:06:35,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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 09:06:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-29 09:06:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-29 09:06:35,112 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:35,112 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:35,136 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 09:06:35,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:35,313 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash -892096126, now seen corresponding path program 1 times [2021-08-29 09:06:35,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:35,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801446870] [2021-08-29 09:06:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:35,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-08-29 09:06:35,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:35,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801446870] [2021-08-29 09:06:35,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801446870] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 09:06:35,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 09:06:35,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-29 09:06:35,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072146371] [2021-08-29 09:06:35,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 09:06:35,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 09:06:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-29 09:06:35,356 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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 09:06:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:35,445 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-08-29 09:06:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 09:06:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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 32 [2021-08-29 09:06:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:35,446 INFO L225 Difference]: With dead ends: 62 [2021-08-29 09:06:35,446 INFO L226 Difference]: Without dead ends: 33 [2021-08-29 09:06:35,446 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.25ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-29 09:06:35,447 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.11ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:35,447 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 129 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [4 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 54.11ms Time] [2021-08-29 09:06:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-29 09:06:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-29 09:06:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 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 09:06:35,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-08-29 09:06:35,451 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 32 [2021-08-29 09:06:35,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:35,451 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-08-29 09:06:35,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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 09:06:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-08-29 09:06:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-29 09:06:35,452 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:35,452 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:35,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-29 09:06:35,452 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:35,452 INFO L82 PathProgramCache]: Analyzing trace with hash 494107268, now seen corresponding path program 1 times [2021-08-29 09:06:35,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:35,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713822049] [2021-08-29 09:06:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:35,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:35,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:35,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713822049] [2021-08-29 09:06:35,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713822049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:35,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282517859] [2021-08-29 09:06:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:35,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:35,657 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 09:06:35,667 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 09:06:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:35,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-29 09:06:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:35,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-29 09:06:36,080 INFO L354 Elim1Store]: treesize reduction 64, result has 9.9 percent of original size [2021-08-29 09:06:36,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 30 [2021-08-29 09:06:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:36,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:36,176 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 52 treesize of output 43 [2021-08-29 09:06:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:36,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282517859] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:36,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:36,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 37 [2021-08-29 09:06:36,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918870817] [2021-08-29 09:06:36,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-29 09:06:36,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:36,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-29 09:06:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-08-29 09:06:36,285 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 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 09:06:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:37,267 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-08-29 09:06:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-29 09:06:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 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 32 [2021-08-29 09:06:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:37,267 INFO L225 Difference]: With dead ends: 42 [2021-08-29 09:06:37,268 INFO L226 Difference]: Without dead ends: 37 [2021-08-29 09:06:37,268 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1251.66ms TimeCoverageRelationStatistics Valid=881, Invalid=2659, Unknown=0, NotChecked=0, Total=3540 [2021-08-29 09:06:37,269 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 119.83ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:37,269 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 265 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [62 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 119.83ms Time] [2021-08-29 09:06:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-29 09:06:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-29 09:06:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 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 09:06:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-08-29 09:06:37,274 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 32 [2021-08-29 09:06:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:37,274 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-08-29 09:06:37,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 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 09:06:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-08-29 09:06:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-29 09:06:37,275 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 09:06:37,275 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 09:06:37,293 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 09:06:37,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:37,481 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 09:06:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 09:06:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash 365314510, now seen corresponding path program 2 times [2021-08-29 09:06:37,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 09:06:37,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497563918] [2021-08-29 09:06:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 09:06:37,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 09:06:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 09:06:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 09:06:37,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 09:06:37,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497563918] [2021-08-29 09:06:37,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497563918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 09:06:37,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509424746] [2021-08-29 09:06:37,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 09:06:37,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 09:06:37,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 09:06:37,741 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 09:06:37,742 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 09:06:37,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 09:06:37,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 09:06:37,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-29 09:06:37,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 09:06:37,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-08-29 09:06:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-29 09:06:38,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 09:06:38,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 09:06:38,690 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 129 treesize of output 131 [2021-08-29 09:06:38,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 36 [2021-08-29 09:06:38,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 09:06:38,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 114 treesize of output 111 [2021-08-29 09:06:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-29 09:06:38,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509424746] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 09:06:38,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 09:06:38,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2021-08-29 09:06:38,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774319088] [2021-08-29 09:06:38,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-29 09:06:38,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 09:06:38,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-29 09:06:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2021-08-29 09:06:38,914 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 40 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 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 09:06:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 09:06:40,282 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-08-29 09:06:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-29 09:06:40,282 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 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 36 [2021-08-29 09:06:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 09:06:40,282 INFO L225 Difference]: With dead ends: 39 [2021-08-29 09:06:40,283 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 09:06:40,284 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1746.19ms TimeCoverageRelationStatistics Valid=451, Invalid=4105, Unknown=0, NotChecked=0, Total=4556 [2021-08-29 09:06:40,284 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 190.29ms IncrementalHoareTripleChecker+Time [2021-08-29 09:06:40,284 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 515 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [10 Valid, 468 Invalid, 0 Unknown, 37 Unchecked, 190.29ms Time] [2021-08-29 09:06:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 09:06:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 09:06:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 09:06:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 09:06:40,285 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-08-29 09:06:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 09:06:40,285 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 09:06:40,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 40 states have internal predecessors, (66), 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 09:06:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 09:06:40,286 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 09:06:40,288 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 09:06:40,307 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 09:06:40,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-29 09:06:40,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 09:06:40,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 09:06:40,836 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 52) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L861 garLoopResultBuilder]: At program point L53(lines 33 54) the Hoare annotation is: true [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point L45(lines 45 47) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point L25(line 25) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point L25-2(line 25) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L854 garLoopResultBuilder]: At program point L25-3(lines 23 26) the Hoare annotation is: (let ((.cse0 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse1 (= |~#d2~0.offset| 0)) (.cse2 (= |~#d1~0.offset| 0)) (.cse3 (= |ULTIMATE.start_get_dummy_#res.offset| 0))) (or (and .cse0 .cse1 (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|) .cse2 .cse3) (and .cse0 .cse1 .cse2 (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|) .cse3))) [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point L25-4(line 25) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point L25-6(line 25) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L854 garLoopResultBuilder]: At program point L25-7(lines 23 26) the Hoare annotation is: (let ((.cse0 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse1 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|)) (.cse5 (= |ULTIMATE.start_get_dummy_#res.offset| 0)) (.cse8 (= ULTIMATE.start_main_~pd1~0.base |ULTIMATE.start_get_dummy_#res.base|))) (let ((.cse2 (not .cse8)) (.cse3 (= |~#d1~0.offset| 0)) (.cse4 (let ((.cse6 (= |~#d2~0.offset| 0)) (.cse7 (= ULTIMATE.start_main_~pd1~0.offset 0))) (or (and .cse0 .cse6 .cse7 .cse1) (and .cse6 (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|) .cse8 (not (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) .cse5 .cse7))))) (or (and .cse0 (not .cse1) .cse2 .cse3) (and .cse2 .cse3 .cse4) (and .cse3 .cse5 .cse4)))) [2021-08-29 09:06:40,837 INFO L854 garLoopResultBuilder]: At program point L46(lines 34 54) the Hoare annotation is: false [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point L42-1(lines 42 44) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L854 garLoopResultBuilder]: At program point L42-3(lines 42 44) the Hoare annotation is: (and (not (= |~#d1~0.base| |~#d2~0.base|)) (= |~#d2~0.offset| 0) (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base) (<= 0 ULTIMATE.start_main_~pd2~0.offset) (= |~#d1~0.offset| 0) (exists ((aux_div_ULTIMATE.start_main_~pd1~0.offset_94 Int)) (and (<= aux_div_ULTIMATE.start_main_~pd1~0.offset_94 (div (+ ULTIMATE.start_main_~pa~0.offset (* ULTIMATE.start_main_~pd2~0.offset (- 1)) (- 8)) 4)) (= aux_div_ULTIMATE.start_main_~pd1~0.offset_94 (select (select |#memory_int| ULTIMATE.start_main_~pd2~0.base) (+ ULTIMATE.start_main_~pd2~0.offset (* aux_div_ULTIMATE.start_main_~pd1~0.offset_94 4) 8))) (< (div (+ (* ULTIMATE.start_main_~pa~0.offset (- 1)) 8) (- 4)) (+ aux_div_ULTIMATE.start_main_~pd1~0.offset_94 1)))) (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1))) [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 48) no Hoare annotation was computed. [2021-08-29 09:06:40,837 INFO L858 garLoopResultBuilder]: For program point L42-4(lines 42 44) no Hoare annotation was computed. [2021-08-29 09:06:40,838 INFO L858 garLoopResultBuilder]: For program point L38-2(lines 38 48) no Hoare annotation was computed. [2021-08-29 09:06:40,838 INFO L854 garLoopResultBuilder]: At program point L30(lines 28 31) the Hoare annotation is: (and (not (= |~#d1~0.base| |~#d2~0.base|)) (= |~#d2~0.offset| 0) (<= 1 |ULTIMATE.start_check_#res|) (= |~#d1~0.offset| 0)) [2021-08-29 09:06:40,838 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 21) no Hoare annotation was computed. [2021-08-29 09:06:40,840 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 09:06:40,851 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,852 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,852 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,852 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,853 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,853 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,853 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,853 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 09:06:40 BoogieIcfgContainer [2021-08-29 09:06:40,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 09:06:40,855 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 09:06:40,855 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 09:06:40,855 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 09:06:40,855 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 09:06:27" (3/4) ... [2021-08-29 09:06:40,857 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 09:06:40,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-29 09:06:40,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-29 09:06:40,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 09:06:40,863 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 09:06:40,876 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(d1 == d2) && d2 == 0) && \result == d2) && d1 == 0) && \result == 0) || ((((!(d1 == d2) && d2 == 0) && d1 == 0) && d1 == \result) && \result == 0) [2021-08-29 09:06:40,876 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((!(d1 == d2) && !(pd1 == d1)) && !(pd1 == \result)) && d1 == 0) || ((!(pd1 == \result) && d1 == 0) && ((((!(d1 == d2) && d2 == 0) && pd1 == 0) && pd1 == d1) || (((((d2 == 0 && \result == d2) && pd1 == \result) && !(d1 == \result)) && \result == 0) && pd1 == 0)))) || ((d1 == 0 && \result == 0) && ((((!(d1 == d2) && d2 == 0) && pd1 == 0) && pd1 == d1) || (((((d2 == 0 && \result == d2) && pd1 == \result) && !(d1 == \result)) && \result == 0) && pd1 == 0))) [2021-08-29 09:06:40,877 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((!(d1 == d2) && d2 == 0) && pd2 == pa) && 0 <= pd2) && d1 == 0) && (\exists aux_div_ULTIMATE.start_main_~pd1~0.offset_94 : int :: (aux_div_ULTIMATE.start_main_~pd1~0.offset_94 <= (pa + pd2 * -1 + -8) / 4 && aux_div_ULTIMATE.start_main_~pd1~0.offset_94 == unknown-#memory_int-unknown[pd2][pd2 + aux_div_ULTIMATE.start_main_~pd1~0.offset_94 * 4 + 8]) && (pa * -1 + 8) / -4 < aux_div_ULTIMATE.start_main_~pd1~0.offset_94 + 1)) && i < unknown-#memory_int-unknown[pa][pa] + 1 [2021-08-29 09:06:40,877 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((!(d1 == d2) && d2 == 0) && 1 <= \result) && d1 == 0 [2021-08-29 09:06:40,883 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 09:06:40,883 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 09:06:40,883 INFO L158 Benchmark]: Toolchain (without parser) took 13899.81ms. Allocated memory was 50.3MB in the beginning and 130.0MB in the end (delta: 79.7MB). Free memory was 27.2MB in the beginning and 41.7MB in the end (delta: -14.5MB). Peak memory consumption was 65.8MB. Max. memory is 16.1GB. [2021-08-29 09:06:40,883 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 50.3MB. Free memory is still 32.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:06:40,884 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.32ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.0MB in the beginning and 43.6MB in the end (delta: -16.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 09:06:40,884 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.64ms. Allocated memory is still 60.8MB. Free memory was 43.4MB in the beginning and 41.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 09:06:40,884 INFO L158 Benchmark]: Boogie Preprocessor took 30.65ms. Allocated memory is still 60.8MB. Free memory was 41.8MB in the beginning and 40.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:06:40,884 INFO L158 Benchmark]: RCFGBuilder took 197.51ms. Allocated memory is still 60.8MB. Free memory was 40.4MB in the beginning and 30.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 09:06:40,884 INFO L158 Benchmark]: TraceAbstraction took 13382.53ms. Allocated memory was 60.8MB in the beginning and 130.0MB in the end (delta: 69.2MB). Free memory was 29.9MB in the beginning and 44.8MB in the end (delta: -14.9MB). Peak memory consumption was 56.2MB. Max. memory is 16.1GB. [2021-08-29 09:06:40,885 INFO L158 Benchmark]: Witness Printer took 28.17ms. Allocated memory is still 130.0MB. Free memory was 44.8MB in the beginning and 41.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 09:06:40,886 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 50.3MB. Free memory is still 32.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.32ms. Allocated memory was 50.3MB in the beginning and 60.8MB in the end (delta: 10.5MB). Free memory was 27.0MB in the beginning and 43.6MB in the end (delta: -16.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.64ms. Allocated memory is still 60.8MB. Free memory was 43.4MB in the beginning and 41.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.65ms. Allocated memory is still 60.8MB. Free memory was 41.8MB in the beginning and 40.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 197.51ms. Allocated memory is still 60.8MB. Free memory was 40.4MB in the beginning and 30.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 13382.53ms. Allocated memory was 60.8MB in the beginning and 130.0MB in the end (delta: 69.2MB). Free memory was 29.9MB in the beginning and 44.8MB in the end (delta: -14.9MB). Peak memory consumption was 56.2MB. Max. memory is 16.1GB. * Witness Printer took 28.17ms. Allocated memory is still 130.0MB. Free memory was 44.8MB in the beginning and 41.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] * 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 - PositiveResult [Line: 52]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13322.50ms, OverallIterations: 10, TraceHistogramMax: 11, EmptinessCheckTime: 10.76ms, AutomataDifference: 5313.62ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 336.57ms, InitialAbstractionConstructionTime: 7.34ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 490 SdHoareTripleChecker+Valid, 1148.58ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 490 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 937.55ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 104 IncrementalHoareTripleChecker+Unchecked, 768 mSDsCounter, 151 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2488 IncrementalHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 151 mSolverCounterUnsat, 0 mSDtfsCounter, 2488 mSolverCounterSat, 16.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 521 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 6439.90ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, InterpolantAutomatonStates: 210, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 42.79ms AutomataMinimizationTime, 10 MinimizatonAttempts, 104 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 34 NumberOfFragments, 214 HoareAnnotationTreeSize, 6 FomulaSimplifications, 43714 FormulaSimplificationTreeSizeReduction, 112.25ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 2612 FormulaSimplificationTreeSizeReductionInter, 218.64ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 66.14ms SsaConstructionTime, 274.52ms SatisfiabilityAnalysisTime, 5966.78ms InterpolantComputationTime, 371 NumberOfCodeBlocks, 361 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 489 ConstructedInterpolants, 62 QuantifiedInterpolants, 6816 SizeOfPredicates, 81 NumberOfNonLiveVariables, 734 ConjunctsInSsa, 213 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 338/828 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((!(d1 == d2) && !(pd1 == d1)) && !(pd1 == \result)) && d1 == 0) || ((!(pd1 == \result) && d1 == 0) && ((((!(d1 == d2) && d2 == 0) && pd1 == 0) && pd1 == d1) || (((((d2 == 0 && \result == d2) && pd1 == \result) && !(d1 == \result)) && \result == 0) && pd1 == 0)))) || ((d1 == 0 && \result == 0) && ((((!(d1 == d2) && d2 == 0) && pd1 == 0) && pd1 == d1) || (((((d2 == 0 && \result == d2) && pd1 == \result) && !(d1 == \result)) && \result == 0) && pd1 == 0))) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((!(d1 == d2) && d2 == 0) && 1 <= \result) && d1 == 0 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((!(d1 == d2) && d2 == 0) && \result == d2) && d1 == 0) && \result == 0) || ((((!(d1 == d2) && d2 == 0) && d1 == 0) && d1 == \result) && \result == 0) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 42]: Loop Invariant [2021-08-29 09:06:40,893 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,893 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,893 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,893 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,894 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,894 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,894 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] [2021-08-29 09:06:40,894 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[aux_div_ULTIMATE.start_main_~pd1~0.offset_94,QUANTIFIED] Derived loop invariant: (((((!(d1 == d2) && d2 == 0) && pd2 == pa) && 0 <= pd2) && d1 == 0) && (\exists aux_div_ULTIMATE.start_main_~pd1~0.offset_94 : int :: (aux_div_ULTIMATE.start_main_~pd1~0.offset_94 <= (pa + pd2 * -1 + -8) / 4 && aux_div_ULTIMATE.start_main_~pd1~0.offset_94 == unknown-#memory_int-unknown[pd2][pd2 + aux_div_ULTIMATE.start_main_~pd1~0.offset_94 * 4 + 8]) && (pa * -1 + 8) / -4 < aux_div_ULTIMATE.start_main_~pd1~0.offset_94 + 1)) && i < unknown-#memory_int-unknown[pa][pa] + 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 09:06:40,908 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...