./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/test25-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/test25-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:05:12,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:05:12,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:05:12,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:05:12,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:05:12,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:05:12,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:05:12,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:05:12,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:05:12,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:05:12,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:05:12,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:05:12,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:05:12,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:05:12,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:05:12,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:05:12,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:05:12,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:05:12,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:05:12,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:05:12,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:05:12,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:05:12,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:05:12,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:05:12,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:05:12,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:05:12,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:05:12,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:05:12,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:05:12,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:05:12,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:05:12,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:05:12,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:05:12,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:05:12,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:05:12,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:05:12,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:05:12,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:05:12,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:05:12,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:05:12,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:05:12,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:05:12,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:05:12,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:05:12,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:05:12,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:05:12,366 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:05:12,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:05:12,367 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:05:12,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:05:12,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:05:12,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:05:12,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:05:12,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:05:12,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:05:12,369 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:05:12,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:05:12,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:05:12,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:05:12,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:05:12,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:05:12,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:05:12,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:05:12,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:05:12,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:05:12,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:05:12,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:05:12,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:05:12,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:05:12,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:05:12,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:05:12,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 [2020-10-25 22:05:12,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:05:12,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:05:12,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:05:12,956 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:05:12,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:05:12,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2020-10-25 22:05:13,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/437b11f4c/adcc9d511246425e80a0ad4624e1265e/FLAG43281b87d [2020-10-25 22:05:13,686 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:05:13,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2020-10-25 22:05:13,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/437b11f4c/adcc9d511246425e80a0ad4624e1265e/FLAG43281b87d [2020-10-25 22:05:13,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/437b11f4c/adcc9d511246425e80a0ad4624e1265e [2020-10-25 22:05:14,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:05:14,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:05:14,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:05:14,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:05:14,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:05:14,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57967de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14, skipping insertion in model container [2020-10-25 22:05:14,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:05:14,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:05:14,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:05:14,281 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:05:14,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:05:14,325 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:05:14,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14 WrapperNode [2020-10-25 22:05:14,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:05:14,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:05:14,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:05:14,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:05:14,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:05:14,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:05:14,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:05:14,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:05:14,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,404 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... [2020-10-25 22:05:14,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:05:14,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:05:14,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:05:14,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:05:14,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:05:14,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-25 22:05:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:05:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-25 22:05:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:05:14,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 22:05:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:05:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:05:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:05:14,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:05:15,013 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:05:15,014 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 22:05:15,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:15 BoogieIcfgContainer [2020-10-25 22:05:15,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:05:15,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:05:15,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:05:15,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:05:15,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:05:14" (1/3) ... [2020-10-25 22:05:15,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de00158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:05:15, skipping insertion in model container [2020-10-25 22:05:15,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:14" (2/3) ... [2020-10-25 22:05:15,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de00158 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:05:15, skipping insertion in model container [2020-10-25 22:05:15,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:15" (3/3) ... [2020-10-25 22:05:15,029 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-25 22:05:15,047 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:05:15,054 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:05:15,069 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:05:15,115 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:05:15,116 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:05:15,116 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:05:15,116 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:05:15,117 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:05:15,117 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:05:15,117 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:05:15,117 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:05:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-25 22:05:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:05:15,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:15,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:15,143 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-10-25 22:05:15,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:15,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067387637] [2020-10-25 22:05:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:15,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067387637] [2020-10-25 22:05:15,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:15,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:05:15,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231898258] [2020-10-25 22:05:15,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:05:15,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:15,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:05:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:05:15,414 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-25 22:05:15,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:15,435 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-10-25 22:05:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:05:15,437 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-25 22:05:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:15,446 INFO L225 Difference]: With dead ends: 31 [2020-10-25 22:05:15,446 INFO L226 Difference]: Without dead ends: 13 [2020-10-25 22:05:15,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:05:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-25 22:05:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-25 22:05:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-25 22:05:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-25 22:05:15,488 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-25 22:05:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:15,489 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-25 22:05:15,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:05:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-25 22:05:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:05:15,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:15,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:15,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:05:15,491 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:15,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-10-25 22:05:15,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:15,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459523466] [2020-10-25 22:05:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:15,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459523466] [2020-10-25 22:05:15,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:15,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:05:15,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315136883] [2020-10-25 22:05:15,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:05:15,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:15,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:05:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:05:15,566 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-25 22:05:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:15,592 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-25 22:05:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:05:15,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-25 22:05:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:15,594 INFO L225 Difference]: With dead ends: 24 [2020-10-25 22:05:15,595 INFO L226 Difference]: Without dead ends: 15 [2020-10-25 22:05:15,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:05:15,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-25 22:05:15,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-25 22:05:15,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-25 22:05:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-25 22:05:15,600 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-25 22:05:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:15,601 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-25 22:05:15,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:05:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-25 22:05:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 22:05:15,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:15,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:15,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:05:15,602 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:15,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2020-10-25 22:05:15,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:15,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868352801] [2020-10-25 22:05:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:15,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868352801] [2020-10-25 22:05:15,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251914919] [2020-10-25 22:05:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:05:15,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:15,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:15,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-25 22:05:15,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316679722] [2020-10-25 22:05:15,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:05:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:05:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:05:15,878 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-10-25 22:05:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:15,913 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-25 22:05:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:05:15,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-25 22:05:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:15,915 INFO L225 Difference]: With dead ends: 26 [2020-10-25 22:05:15,915 INFO L226 Difference]: Without dead ends: 17 [2020-10-25 22:05:15,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-25 22:05:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-25 22:05:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-25 22:05:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-25 22:05:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-25 22:05:15,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-25 22:05:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:15,921 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-25 22:05:15,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:05:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-25 22:05:15,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:05:15,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:15,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:16,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 22:05:16,135 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:16,137 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2020-10-25 22:05:16,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:16,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414974710] [2020-10-25 22:05:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:16,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414974710] [2020-10-25 22:05:16,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272266317] [2020-10-25 22:05:16,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:16,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-25 22:05:16,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-25 22:05:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:16,620 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-10-25 22:05:16,621 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-10-25 22:05:16,624 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:16,629 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:16,630 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:16,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-10-25 22:05:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 22:05:16,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 22:05:16,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-10-25 22:05:16,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109687057] [2020-10-25 22:05:16,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:05:16,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:05:16,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:05:16,669 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-25 22:05:16,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:16,767 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-25 22:05:16,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:05:16,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-25 22:05:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:16,770 INFO L225 Difference]: With dead ends: 23 [2020-10-25 22:05:16,770 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 22:05:16,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:05:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 22:05:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-25 22:05:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 22:05:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-25 22:05:16,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-25 22:05:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:16,776 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-25 22:05:16,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:05:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-25 22:05:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 22:05:16,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:16,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:16,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:16,991 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1859304665, now seen corresponding path program 1 times [2020-10-25 22:05:16,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:16,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068393117] [2020-10-25 22:05:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 22:05:17,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068393117] [2020-10-25 22:05:17,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654806770] [2020-10-25 22:05:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:17,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:05:17,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 22:05:17,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:17,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-25 22:05:17,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044794573] [2020-10-25 22:05:17,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:05:17,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:17,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:05:17,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:05:17,230 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-25 22:05:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:17,273 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-25 22:05:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:05:17,274 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-25 22:05:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:17,275 INFO L225 Difference]: With dead ends: 32 [2020-10-25 22:05:17,275 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 22:05:17,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:05:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 22:05:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-25 22:05:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-25 22:05:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-25 22:05:17,281 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-25 22:05:17,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:17,282 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-25 22:05:17,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:05:17,282 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-25 22:05:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 22:05:17,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:17,284 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:17,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:17,499 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:17,501 INFO L82 PathProgramCache]: Analyzing trace with hash 291228695, now seen corresponding path program 2 times [2020-10-25 22:05:17,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:17,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107237134] [2020-10-25 22:05:17,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 22:05:17,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107237134] [2020-10-25 22:05:17,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722638386] [2020-10-25 22:05:17,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:17,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:05:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:17,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:05:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 22:05:17,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:17,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-25 22:05:17,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812183206] [2020-10-25 22:05:17,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:05:17,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:17,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:05:17,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:05:17,916 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2020-10-25 22:05:17,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:17,999 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-25 22:05:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:05:18,000 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-25 22:05:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:18,001 INFO L225 Difference]: With dead ends: 34 [2020-10-25 22:05:18,001 INFO L226 Difference]: Without dead ends: 23 [2020-10-25 22:05:18,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:05:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-25 22:05:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-25 22:05:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-25 22:05:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-25 22:05:18,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-25 22:05:18,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:18,012 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-25 22:05:18,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:05:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-25 22:05:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-25 22:05:18,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:18,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:18,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:18,229 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash 903742421, now seen corresponding path program 3 times [2020-10-25 22:05:18,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:18,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338561135] [2020-10-25 22:05:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 22:05:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338561135] [2020-10-25 22:05:18,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871071155] [2020-10-25 22:05:18,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:18,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-25 22:05:18,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:18,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-25 22:05:18,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:18,554 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-10-25 22:05:18,555 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-10-25 22:05:18,557 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:18,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:18,561 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:18,561 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-10-25 22:05:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-25 22:05:18,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:18,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-25 22:05:18,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499032424] [2020-10-25 22:05:18,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 22:05:18,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:18,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 22:05:18,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-25 22:05:18,586 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-10-25 22:05:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:18,752 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-25 22:05:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 22:05:18,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-25 22:05:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:18,753 INFO L225 Difference]: With dead ends: 38 [2020-10-25 22:05:18,754 INFO L226 Difference]: Without dead ends: 27 [2020-10-25 22:05:18,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:05:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-25 22:05:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-25 22:05:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 22:05:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-25 22:05:18,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-10-25 22:05:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:18,761 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-25 22:05:18,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 22:05:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-25 22:05:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-25 22:05:18,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:18,763 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:18,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-25 22:05:18,976 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1251069224, now seen corresponding path program 4 times [2020-10-25 22:05:18,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:18,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357278566] [2020-10-25 22:05:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-25 22:05:19,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357278566] [2020-10-25 22:05:19,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346864691] [2020-10-25 22:05:19,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:19,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:05:19,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:19,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-25 22:05:19,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:19,312 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-10-25 22:05:19,313 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-10-25 22:05:19,317 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:19,321 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:19,322 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:19,322 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-10-25 22:05:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-25 22:05:19,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:19,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-25 22:05:19,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103785260] [2020-10-25 22:05:19,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-25 22:05:19,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:19,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-25 22:05:19,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:05:19,361 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2020-10-25 22:05:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:19,609 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-25 22:05:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-25 22:05:19,610 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-25 22:05:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:19,610 INFO L225 Difference]: With dead ends: 44 [2020-10-25 22:05:19,610 INFO L226 Difference]: Without dead ends: 31 [2020-10-25 22:05:19,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:05:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-25 22:05:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-25 22:05:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:05:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-25 22:05:19,617 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-10-25 22:05:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:19,617 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-25 22:05:19,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-25 22:05:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-25 22:05:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-25 22:05:19,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:19,618 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:19,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:19,832 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1378869733, now seen corresponding path program 5 times [2020-10-25 22:05:19,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:19,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802849741] [2020-10-25 22:05:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-25 22:05:19,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802849741] [2020-10-25 22:05:19,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629816060] [2020-10-25 22:05:19,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:21,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-25 22:05:21,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:21,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 22:05:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-25 22:05:21,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:21,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-25 22:05:21,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546410383] [2020-10-25 22:05:21,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:05:21,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:05:21,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:05:21,640 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-10-25 22:05:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:21,703 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-25 22:05:21,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:05:21,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-25 22:05:21,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:21,705 INFO L225 Difference]: With dead ends: 48 [2020-10-25 22:05:21,705 INFO L226 Difference]: Without dead ends: 33 [2020-10-25 22:05:21,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:05:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-25 22:05:21,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-25 22:05:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-25 22:05:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-25 22:05:21,711 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-25 22:05:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:21,712 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-25 22:05:21,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:05:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-25 22:05:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 22:05:21,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:21,713 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:21,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:21,928 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1005994073, now seen corresponding path program 6 times [2020-10-25 22:05:21,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:21,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36737174] [2020-10-25 22:05:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-25 22:05:22,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36737174] [2020-10-25 22:05:22,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29368479] [2020-10-25 22:05:22,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:23,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-25 22:05:23,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-25 22:05:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:23,866 INFO L350 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2020-10-25 22:05:23,867 INFO L384 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 47 treesize of output 12 [2020-10-25 22:05:23,869 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:23,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:23,872 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:23,872 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:5 [2020-10-25 22:05:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-25 22:05:23,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:23,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-10-25 22:05:23,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006374494] [2020-10-25 22:05:23,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-25 22:05:23,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-25 22:05:23,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:05:23,904 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2020-10-25 22:05:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:24,245 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-25 22:05:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-25 22:05:24,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-25 22:05:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:24,247 INFO L225 Difference]: With dead ends: 52 [2020-10-25 22:05:24,247 INFO L226 Difference]: Without dead ends: 37 [2020-10-25 22:05:24,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-25 22:05:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-25 22:05:24,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-25 22:05:24,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-25 22:05:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-25 22:05:24,254 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-10-25 22:05:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:24,254 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-25 22:05:24,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-25 22:05:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-25 22:05:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-25 22:05:24,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:24,256 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:24,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-25 22:05:24,469 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:24,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1595148508, now seen corresponding path program 7 times [2020-10-25 22:05:24,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:24,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372865927] [2020-10-25 22:05:24,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-25 22:05:24,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372865927] [2020-10-25 22:05:24,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717418967] [2020-10-25 22:05:24,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-25 22:05:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-25 22:05:24,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:24,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-25 22:05:24,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082565117] [2020-10-25 22:05:24,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 22:05:24,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:24,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 22:05:24,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:05:24,723 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-10-25 22:05:24,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:24,784 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-25 22:05:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 22:05:24,785 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-25 22:05:24,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:24,786 INFO L225 Difference]: With dead ends: 56 [2020-10-25 22:05:24,786 INFO L226 Difference]: Without dead ends: 39 [2020-10-25 22:05:24,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:05:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-25 22:05:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-25 22:05:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-25 22:05:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-25 22:05:24,792 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-25 22:05:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:24,793 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-25 22:05:24,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 22:05:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-25 22:05:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-25 22:05:24,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:24,794 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:25,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:25,010 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1671756646, now seen corresponding path program 8 times [2020-10-25 22:05:25,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:25,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513299772] [2020-10-25 22:05:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-25 22:05:25,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513299772] [2020-10-25 22:05:25,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112494655] [2020-10-25 22:05:25,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:25,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:05:25,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:25,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-25 22:05:25,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-25 22:05:25,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:25,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-25 22:05:25,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636800436] [2020-10-25 22:05:25,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-25 22:05:25,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-25 22:05:25,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:05:25,285 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 13 states. [2020-10-25 22:05:25,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:25,359 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-25 22:05:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 22:05:25,359 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-25 22:05:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:25,360 INFO L225 Difference]: With dead ends: 57 [2020-10-25 22:05:25,360 INFO L226 Difference]: Without dead ends: 40 [2020-10-25 22:05:25,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:05:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-25 22:05:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-25 22:05:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-25 22:05:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-25 22:05:25,366 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-25 22:05:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:25,366 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-25 22:05:25,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-25 22:05:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-25 22:05:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-25 22:05:25,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:25,367 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:25,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:25,580 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1546516264, now seen corresponding path program 9 times [2020-10-25 22:05:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:25,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132959611] [2020-10-25 22:05:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:26,161 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 23: A-local: [(|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,162 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 24: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,162 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 25: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,163 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 26: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,164 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 27: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,164 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 28: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,165 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 29: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,165 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 30: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,166 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 31: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,166 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 32: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,167 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 33: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,167 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 34: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-25 22:05:26,169 ERROR L253 erpolLogProxyWrapper]: Interpolant 35 not inductive [2020-10-25 22:05:26,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-25 22:05:26,171 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-25 22:05:26,176 INFO L168 Benchmark]: Toolchain (without parser) took 12172.66 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 25.3 MB in the beginning and 46.5 MB in the end (delta: -21.2 MB). Peak memory consumption was 48.8 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:26,177 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 39.8 MB. Free memory was 17.9 MB in the beginning and 17.9 MB in the end (delta: 31.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:05:26,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.12 ms. Allocated memory is still 48.2 MB. Free memory was 24.6 MB in the beginning and 25.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:26,178 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.38 ms. Allocated memory is still 48.2 MB. Free memory was 25.9 MB in the beginning and 24.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:26,179 INFO L168 Benchmark]: Boogie Preprocessor took 33.37 ms. Allocated memory is still 48.2 MB. Free memory was 24.3 MB in the beginning and 23.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:26,180 INFO L168 Benchmark]: RCFGBuilder took 608.50 ms. Allocated memory is still 48.2 MB. Free memory was 23.0 MB in the beginning and 30.7 MB in the end (delta: -7.7 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:26,180 INFO L168 Benchmark]: TraceAbstraction took 11153.98 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 30.3 MB in the beginning and 46.5 MB in the end (delta: -16.3 MB). Peak memory consumption was 51.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:26,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 39.8 MB. Free memory was 17.9 MB in the beginning and 17.9 MB in the end (delta: 31.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.12 ms. Allocated memory is still 48.2 MB. Free memory was 24.6 MB in the beginning and 25.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.38 ms. Allocated memory is still 48.2 MB. Free memory was 25.9 MB in the beginning and 24.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.37 ms. Allocated memory is still 48.2 MB. Free memory was 24.3 MB in the beginning and 23.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 608.50 ms. Allocated memory is still 48.2 MB. Free memory was 23.0 MB in the beginning and 30.7 MB in the end (delta: -7.7 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11153.98 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 30.3 MB in the beginning and 46.5 MB in the end (delta: -16.3 MB). Peak memory consumption was 51.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-5485861 [2020-10-25 22:05:28,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:05:28,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:05:28,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:05:28,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:05:28,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:05:28,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:05:28,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:05:28,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:05:28,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:05:28,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:05:28,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:05:28,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:05:28,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:05:28,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:05:28,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:05:28,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:05:28,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:05:28,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:05:28,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:05:28,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:05:28,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:05:28,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:05:28,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:05:28,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:05:28,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:05:28,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:05:28,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:05:28,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:05:28,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:05:28,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:05:28,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:05:28,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:05:28,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:05:28,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:05:28,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:05:28,937 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:05:28,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:05:28,938 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:05:28,939 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:05:28,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:05:28,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 22:05:28,976 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:05:28,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:05:28,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:05:28,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:05:28,979 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:05:28,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:05:28,980 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:05:28,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:05:28,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:05:28,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:05:28,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:05:28,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:05:28,981 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 22:05:28,982 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 22:05:28,982 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:05:28,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:05:28,982 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:05:28,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:05:28,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:05:28,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:05:28,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:05:28,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:05:28,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:05:28,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:05:28,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:05:28,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:05:28,985 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 22:05:28,985 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 22:05:28,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:05:28,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:05:28,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 22:05:28,986 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 [2020-10-25 22:05:29,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:05:29,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:05:29,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:05:29,398 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:05:29,400 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:05:29,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2020-10-25 22:05:29,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8427ed8d1/2617aab479a3494ba665b9644f5dc40f/FLAGc40bda9a4 [2020-10-25 22:05:30,186 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:05:30,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2020-10-25 22:05:30,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8427ed8d1/2617aab479a3494ba665b9644f5dc40f/FLAGc40bda9a4 [2020-10-25 22:05:30,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8427ed8d1/2617aab479a3494ba665b9644f5dc40f [2020-10-25 22:05:30,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:05:30,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:05:30,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:05:30,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:05:30,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:05:30,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:30,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6f5acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30, skipping insertion in model container [2020-10-25 22:05:30,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:30,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:05:30,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:05:30,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:05:30,902 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:05:30,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:05:30,948 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:05:30,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30 WrapperNode [2020-10-25 22:05:30,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:05:30,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:05:30,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:05:30,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:05:30,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:30,972 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:30,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:05:30,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:05:30,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:05:30,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:05:31,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:31,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:31,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:31,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:31,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:31,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:31,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... [2020-10-25 22:05:31,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:05:31,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:05:31,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:05:31,031 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:05:31,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:05:31,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-25 22:05:31,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 22:05:31,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-25 22:05:31,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:05:31,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-25 22:05:31,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:05:31,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:05:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:05:31,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-25 22:05:31,690 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:05:31,690 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 22:05:31,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:31 BoogieIcfgContainer [2020-10-25 22:05:31,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:05:31,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:05:31,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:05:31,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:05:31,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:05:30" (1/3) ... [2020-10-25 22:05:31,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d4ede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:05:31, skipping insertion in model container [2020-10-25 22:05:31,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:30" (2/3) ... [2020-10-25 22:05:31,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d4ede6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:05:31, skipping insertion in model container [2020-10-25 22:05:31,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:31" (3/3) ... [2020-10-25 22:05:31,702 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-25 22:05:31,713 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:05:31,719 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:05:31,732 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:05:31,759 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:05:31,760 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:05:31,760 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:05:31,760 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:05:31,760 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:05:31,760 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:05:31,761 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:05:31,761 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:05:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-25 22:05:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 22:05:31,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:31,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:31,781 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-10-25 22:05:31,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:05:31,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573737136] [2020-10-25 22:05:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-25 22:05:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-25 22:05:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:31,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:05:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:31,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573737136] [2020-10-25 22:05:31,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:31,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-25 22:05:31,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508287397] [2020-10-25 22:05:31,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:05:31,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:05:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:05:31,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:05:31,982 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-25 22:05:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:32,002 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-10-25 22:05:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:05:32,003 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-25 22:05:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:32,013 INFO L225 Difference]: With dead ends: 31 [2020-10-25 22:05:32,014 INFO L226 Difference]: Without dead ends: 13 [2020-10-25 22:05:32,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:05:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-25 22:05:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-25 22:05:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-25 22:05:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-25 22:05:32,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-25 22:05:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:32,046 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-25 22:05:32,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:05:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-25 22:05:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:05:32,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:32,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:32,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 22:05:32,259 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:32,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-10-25 22:05:32,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:05:32,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412939499] [2020-10-25 22:05:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-25 22:05:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 22:05:32,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:32,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:05:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:32,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412939499] [2020-10-25 22:05:32,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:32,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-25 22:05:32,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896888780] [2020-10-25 22:05:32,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:05:32,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:05:32,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:05:32,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:05:32,396 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-10-25 22:05:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:32,543 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-25 22:05:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:05:32,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-25 22:05:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:32,545 INFO L225 Difference]: With dead ends: 25 [2020-10-25 22:05:32,545 INFO L226 Difference]: Without dead ends: 16 [2020-10-25 22:05:32,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:05:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-25 22:05:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-25 22:05:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-25 22:05:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-25 22:05:32,557 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-10-25 22:05:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:32,558 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-25 22:05:32,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:05:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-25 22:05:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:05:32,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:32,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:32,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 22:05:32,780 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:32,782 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 1 times [2020-10-25 22:05:32,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:05:32,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459466537] [2020-10-25 22:05:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-25 22:05:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:05:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:32,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:05:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:32,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459466537] [2020-10-25 22:05:32,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:32,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-25 22:05:32,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837685129] [2020-10-25 22:05:32,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:05:32,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:05:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:05:32,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:05:32,989 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2020-10-25 22:05:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:33,396 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-25 22:05:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:05:33,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-25 22:05:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:33,398 INFO L225 Difference]: With dead ends: 33 [2020-10-25 22:05:33,398 INFO L226 Difference]: Without dead ends: 24 [2020-10-25 22:05:33,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:05:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-25 22:05:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-25 22:05:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-25 22:05:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-25 22:05:33,405 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-10-25 22:05:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:33,405 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-25 22:05:33,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:05:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-25 22:05:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 22:05:33,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:33,406 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:33,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-25 22:05:33,621 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 2 times [2020-10-25 22:05:33,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:05:33,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461617053] [2020-10-25 22:05:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-25 22:05:33,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-25 22:05:33,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-25 22:05:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:33,947 INFO L384 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 36 treesize of output 12 [2020-10-25 22:05:33,948 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:33,971 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:33,975 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:33,976 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:9 [2020-10-25 22:05:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-25 22:05:34,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:05:34,229 INFO L384 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 37 treesize of output 10 [2020-10-25 22:05:34,240 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:34,242 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:34,242 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:34,242 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:1 [2020-10-25 22:05:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-25 22:05:34,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461617053] [2020-10-25 22:05:34,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:34,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2020-10-25 22:05:34,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775646788] [2020-10-25 22:05:34,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:05:34,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:05:34,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:05:34,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:05:34,255 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-10-25 22:05:34,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:34,894 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-25 22:05:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:05:34,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-25 22:05:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:34,895 INFO L225 Difference]: With dead ends: 33 [2020-10-25 22:05:34,896 INFO L226 Difference]: Without dead ends: 28 [2020-10-25 22:05:34,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:05:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-25 22:05:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-25 22:05:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 22:05:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-25 22:05:34,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2020-10-25 22:05:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:34,904 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-25 22:05:34,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:05:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-25 22:05:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-25 22:05:34,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:34,905 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:35,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-25 22:05:35,124 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1442110442, now seen corresponding path program 1 times [2020-10-25 22:05:35,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:05:35,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765307636] [2020-10-25 22:05:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-25 22:05:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 22:05:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-25 22:05:35,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:05:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-25 22:05:35,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765307636] [2020-10-25 22:05:35,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:35,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-10-25 22:05:35,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049962787] [2020-10-25 22:05:35,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-25 22:05:35,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:05:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-25 22:05:35,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:05:35,562 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 16 states. [2020-10-25 22:05:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:36,722 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-25 22:05:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 22:05:36,724 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-25 22:05:36,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:36,725 INFO L225 Difference]: With dead ends: 49 [2020-10-25 22:05:36,725 INFO L226 Difference]: Without dead ends: 36 [2020-10-25 22:05:36,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-25 22:05:36,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-25 22:05:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-25 22:05:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-25 22:05:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-25 22:05:36,744 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 27 [2020-10-25 22:05:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:36,745 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-25 22:05:36,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-25 22:05:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-25 22:05:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-25 22:05:36,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:36,748 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:36,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-25 22:05:36,964 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash 70008334, now seen corresponding path program 2 times [2020-10-25 22:05:36,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:05:36,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255593930] [2020-10-25 22:05:36,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-25 22:05:37,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:05:37,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-25 22:05:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:37,504 INFO L384 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 36 treesize of output 12 [2020-10-25 22:05:37,505 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:37,522 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:37,525 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:37,525 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:9 [2020-10-25 22:05:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 22:05:37,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:05:38,600 INFO L384 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 61 treesize of output 16 [2020-10-25 22:05:38,611 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:38,612 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:38,612 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:38,613 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:1 [2020-10-25 22:05:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 22:05:38,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255593930] [2020-10-25 22:05:38,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:38,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-10-25 22:05:38,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339251119] [2020-10-25 22:05:38,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-25 22:05:38,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:05:38,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-25 22:05:38,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-25 22:05:38,628 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2020-10-25 22:05:40,423 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-10-25 22:05:41,059 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-10-25 22:05:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:42,092 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-25 22:05:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-25 22:05:42,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-25 22:05:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:42,095 INFO L225 Difference]: With dead ends: 49 [2020-10-25 22:05:42,095 INFO L226 Difference]: Without dead ends: 44 [2020-10-25 22:05:42,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2020-10-25 22:05:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-25 22:05:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-25 22:05:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-25 22:05:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-25 22:05:42,105 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2020-10-25 22:05:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:42,106 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-25 22:05:42,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-25 22:05:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-25 22:05:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-25 22:05:42,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:42,108 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:42,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-25 22:05:42,309 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:42,310 INFO L82 PathProgramCache]: Analyzing trace with hash 312565410, now seen corresponding path program 3 times [2020-10-25 22:05:42,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:05:42,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627327055] [2020-10-25 22:05:42,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-25 22:05:42,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-25 22:05:42,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:42,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-25 22:05:42,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:43,322 INFO L384 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 36 treesize of output 12 [2020-10-25 22:05:43,322 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:43,342 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:43,345 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:43,345 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:9 [2020-10-25 22:05:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 22:05:43,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:05:46,469 INFO L384 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 61 treesize of output 16 [2020-10-25 22:05:46,479 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:46,481 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:46,481 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:46,481 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:1 [2020-10-25 22:05:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 22:05:46,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627327055] [2020-10-25 22:05:46,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:46,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-10-25 22:05:46,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283162553] [2020-10-25 22:05:46,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-25 22:05:46,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:05:46,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-25 22:05:46,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2020-10-25 22:05:46,495 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 23 states. [2020-10-25 22:05:52,091 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-25 22:05:54,133 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-25 22:05:56,081 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-10-25 22:05:58,222 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-10-25 22:06:06,037 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-10-25 22:06:07,397 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2020-10-25 22:06:09,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:06:09,667 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-25 22:06:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-25 22:06:09,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-10-25 22:06:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:06:09,669 INFO L225 Difference]: With dead ends: 70 [2020-10-25 22:06:09,669 INFO L226 Difference]: Without dead ends: 65 [2020-10-25 22:06:09,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=561, Invalid=1989, Unknown=0, NotChecked=0, Total=2550 [2020-10-25 22:06:09,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-25 22:06:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-25 22:06:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-25 22:06:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-25 22:06:09,683 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 43 [2020-10-25 22:06:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:06:09,683 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-25 22:06:09,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-25 22:06:09,684 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-25 22:06:09,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-25 22:06:09,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:06:09,685 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:06:09,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-25 22:06:09,896 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:06:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:06:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash 562473782, now seen corresponding path program 4 times [2020-10-25 22:06:09,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:06:09,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952362132] [2020-10-25 22:06:09,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-25 22:06:10,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:06:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-25 22:06:10,332 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:06:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:06:10,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:06:10,922 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 22:06:10,922 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:06:11,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-25 22:06:11,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:06:11 BoogieIcfgContainer [2020-10-25 22:06:11,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:06:11,225 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:06:11,225 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:06:11,225 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:06:11,226 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:31" (3/4) ... [2020-10-25 22:06:11,228 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:06:11,328 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:06:11,328 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:06:11,331 INFO L168 Benchmark]: Toolchain (without parser) took 40751.96 ms. Allocated memory was 46.1 MB in the beginning and 69.2 MB in the end (delta: 23.1 MB). Free memory was 23.4 MB in the beginning and 35.0 MB in the end (delta: -11.6 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,334 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 46.1 MB. Free memory was 29.0 MB in the beginning and 28.9 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:06:11,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.38 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 23.5 MB in the end (delta: -822.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,336 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.79 ms. Allocated memory is still 46.1 MB. Free memory was 23.5 MB in the beginning and 22.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,337 INFO L168 Benchmark]: Boogie Preprocessor took 33.54 ms. Allocated memory is still 46.1 MB. Free memory was 21.9 MB in the beginning and 20.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:06:11,338 INFO L168 Benchmark]: RCFGBuilder took 661.44 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.5 MB in the beginning and 38.0 MB in the end (delta: -17.6 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,342 INFO L168 Benchmark]: TraceAbstraction took 39529.62 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 37.5 MB in the beginning and 40.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,342 INFO L168 Benchmark]: Witness Printer took 104.06 ms. Allocated memory is still 69.2 MB. Free memory was 40.0 MB in the beginning and 35.0 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 46.1 MB. Free memory was 29.0 MB in the beginning and 28.9 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 361.38 ms. Allocated memory is still 46.1 MB. Free memory was 22.7 MB in the beginning and 23.5 MB in the end (delta: -822.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.79 ms. Allocated memory is still 46.1 MB. Free memory was 23.5 MB in the beginning and 22.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.54 ms. Allocated memory is still 46.1 MB. Free memory was 21.9 MB in the beginning and 20.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 661.44 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 20.5 MB in the beginning and 38.0 MB in the end (delta: -17.6 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39529.62 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 37.5 MB in the beginning and 40.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 104.06 ms. Allocated memory is still 69.2 MB. Free memory was 40.0 MB in the beginning and 35.0 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND FALSE !(j < 10) [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND FALSE !(i < *pa) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] COND TRUE !check(&cont, i) [L3] __assert_fail("0", "test25-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 39.3s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 29.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 119 SDslu, 246 SDs, 0 SdLazy, 522 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 362 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 29.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 215 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 314 ConstructedInterpolants, 19 QuantifiedInterpolants, 64390 SizeOfPredicates, 55 NumberOfNonLiveVariables, 603 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 484/660 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...