./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rew.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/rew.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 eb1f6cdae01d4f2907bde137e48a0b4cd3cd463e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/rew.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 eb1f6cdae01d4f2907bde137e48a0b4cd3cd463e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 21:53:22,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 21:53:22,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 21:53:22,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 21:53:22,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 21:53:22,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 21:53:22,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 21:53:22,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 21:53:22,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 21:53:22,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 21:53:22,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 21:53:22,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 21:53:22,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 21:53:22,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 21:53:22,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 21:53:22,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 21:53:22,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 21:53:22,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 21:53:22,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 21:53:22,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 21:53:22,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 21:53:22,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 21:53:22,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 21:53:22,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 21:53:22,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 21:53:22,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 21:53:22,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 21:53:22,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 21:53:22,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 21:53:22,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 21:53:22,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 21:53:22,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 21:53:22,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 21:53:22,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 21:53:22,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 21:53:22,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 21:53:22,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 21:53:22,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 21:53:22,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 21:53:22,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 21:53:22,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 21:53:22,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 21:53:22,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 21:53:22,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 21:53:22,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 21:53:22,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 21:53:22,246 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 21:53:22,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 21:53:22,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 21:53:22,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 21:53:22,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 21:53:22,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 21:53:22,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 21:53:22,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 21:53:22,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 21:53:22,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 21:53:22,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 21:53:22,249 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 21:53:22,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 21:53:22,249 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 21:53:22,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 21:53:22,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 21:53:22,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 21:53:22,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 21:53:22,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 21:53:22,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 21:53:22,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 21:53:22,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 21:53:22,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 21:53:22,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 21:53:22,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 21:53:22,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> eb1f6cdae01d4f2907bde137e48a0b4cd3cd463e [2020-10-19 21:53:22,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 21:53:22,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 21:53:22,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 21:53:22,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 21:53:22,480 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 21:53:22,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rew.c [2020-10-19 21:53:22,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f17b6e74a/b325bd3688a94a4caa4afe14950c6b1b/FLAG7e2fff942 [2020-10-19 21:53:23,130 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 21:53:23,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c [2020-10-19 21:53:23,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f17b6e74a/b325bd3688a94a4caa4afe14950c6b1b/FLAG7e2fff942 [2020-10-19 21:53:23,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f17b6e74a/b325bd3688a94a4caa4afe14950c6b1b [2020-10-19 21:53:23,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 21:53:23,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 21:53:23,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:23,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 21:53:23,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 21:53:23,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d5586bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23, skipping insertion in model container [2020-10-19 21:53:23,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 21:53:23,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 21:53:23,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:23,824 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 21:53:23,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:23,866 INFO L208 MainTranslator]: Completed translation [2020-10-19 21:53:23,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23 WrapperNode [2020-10-19 21:53:23,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:23,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:23,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 21:53:23,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 21:53:23,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:23,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 21:53:23,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 21:53:23,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 21:53:23,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (1/1) ... [2020-10-19 21:53:23,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 21:53:23,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 21:53:23,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 21:53:23,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 21:53:23,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (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 [2020-10-19 21:53:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 21:53:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 21:53:24,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 21:53:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 21:53:24,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 21:53:24,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 21:53:24,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 21:53:24,246 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 21:53:24,247 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-19 21:53:24,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:24 BoogieIcfgContainer [2020-10-19 21:53:24,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 21:53:24,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 21:53:24,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 21:53:24,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 21:53:24,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 09:53:23" (1/3) ... [2020-10-19 21:53:24,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aebd582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:24, skipping insertion in model container [2020-10-19 21:53:24,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:23" (2/3) ... [2020-10-19 21:53:24,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aebd582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:24, skipping insertion in model container [2020-10-19 21:53:24,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:24" (3/3) ... [2020-10-19 21:53:24,259 INFO L111 eAbstractionObserver]: Analyzing ICFG rew.c [2020-10-19 21:53:24,272 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 21:53:24,279 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 21:53:24,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 21:53:24,337 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 21:53:24,337 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 21:53:24,337 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 21:53:24,338 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 21:53:24,338 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 21:53:24,338 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 21:53:24,338 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 21:53:24,339 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 21:53:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-19 21:53:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 21:53:24,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:24,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:24,381 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:24,386 INFO L82 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2020-10-19 21:53:24,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:24,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060137364] [2020-10-19 21:53:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:24,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060137364] [2020-10-19 21:53:24,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:24,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 21:53:24,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562170719] [2020-10-19 21:53:24,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 21:53:24,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 21:53:24,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:53:24,610 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-19 21:53:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:24,629 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-10-19 21:53:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 21:53:24,631 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-19 21:53:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:24,644 INFO L225 Difference]: With dead ends: 30 [2020-10-19 21:53:24,645 INFO L226 Difference]: Without dead ends: 14 [2020-10-19 21:53:24,649 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 [2020-10-19 21:53:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-19 21:53:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-19 21:53:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-19 21:53:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-19 21:53:24,690 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-10-19 21:53:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:24,691 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-19 21:53:24,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 21:53:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-19 21:53:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 21:53:24,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:24,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:24,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 21:53:24,694 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2020-10-19 21:53:24,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:24,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587468224] [2020-10-19 21:53:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:24,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587468224] [2020-10-19 21:53:24,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:24,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 21:53:24,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958281623] [2020-10-19 21:53:24,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:53:24,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:24,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:53:24,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 21:53:24,816 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-10-19 21:53:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:24,863 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-10-19 21:53:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:53:24,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-19 21:53:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:24,865 INFO L225 Difference]: With dead ends: 29 [2020-10-19 21:53:24,865 INFO L226 Difference]: Without dead ends: 18 [2020-10-19 21:53:24,866 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 [2020-10-19 21:53:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-19 21:53:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-19 21:53:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-19 21:53:24,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-19 21:53:24,871 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-10-19 21:53:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:24,872 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-19 21:53:24,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:53:24,872 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-19 21:53:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 21:53:24,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:24,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:24,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 21:53:24,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:24,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:24,874 INFO L82 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2020-10-19 21:53:24,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:24,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437541387] [2020-10-19 21:53:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:24,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437541387] [2020-10-19 21:53:24,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8880648] [2020-10-19 21:53:24,940 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 [2020-10-19 21:53:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:53:25,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:25,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:25,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-19 21:53:25,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161654473] [2020-10-19 21:53:25,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 21:53:25,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:25,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 21:53:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:53:25,105 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-10-19 21:53:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:25,166 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-19 21:53:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:53:25,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-19 21:53:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:25,167 INFO L225 Difference]: With dead ends: 29 [2020-10-19 21:53:25,167 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 21:53:25,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:53:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 21:53:25,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-19 21:53:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 21:53:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 21:53:25,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-10-19 21:53:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:25,174 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 21:53:25,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 21:53:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 21:53:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:53:25,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:25,175 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:25,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 21:53:25,377 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash -211811063, now seen corresponding path program 2 times [2020-10-19 21:53:25,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:25,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104838745] [2020-10-19 21:53:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 21:53:25,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104838745] [2020-10-19 21:53:25,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:25,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 21:53:25,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069309548] [2020-10-19 21:53:25,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:53:25,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:25,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:53:25,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:53:25,449 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-19 21:53:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:25,489 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-19 21:53:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:53:25,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-19 21:53:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:25,491 INFO L225 Difference]: With dead ends: 29 [2020-10-19 21:53:25,491 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 21:53:25,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:53:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 21:53:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-19 21:53:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 21:53:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 21:53:25,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-19 21:53:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:25,497 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 21:53:25,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:53:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 21:53:25,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:53:25,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:25,498 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:25,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 21:53:25,499 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:25,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2020-10-19 21:53:25,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:25,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331527420] [2020-10-19 21:53:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331527420] [2020-10-19 21:53:25,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617326355] [2020-10-19 21:53:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:53:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 21:53:25,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:25,913 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:25,914 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:25,926 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:25,926 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:25,927 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-10-19 21:53:25,998 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-10-19 21:53:25,999 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2020-10-19 21:53:26,000 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:26,010 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:26,012 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 21:53:26,026 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:29 [2020-10-19 21:53:27,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:27,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:27,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:28,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:28,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-19 21:53:28,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264616509] [2020-10-19 21:53:28,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 21:53:28,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 21:53:28,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=143, Unknown=3, NotChecked=0, Total=182 [2020-10-19 21:53:28,059 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 14 states. [2020-10-19 21:53:29,657 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-10-19 21:53:30,436 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2020-10-19 21:53:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:30,607 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-19 21:53:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 21:53:30,607 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-10-19 21:53:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:30,608 INFO L225 Difference]: With dead ends: 31 [2020-10-19 21:53:30,609 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 21:53:30,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=102, Invalid=315, Unknown=3, NotChecked=0, Total=420 [2020-10-19 21:53:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 21:53:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-10-19 21:53:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-19 21:53:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-19 21:53:30,617 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-19 21:53:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:30,617 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-19 21:53:30,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 21:53:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-19 21:53:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 21:53:30,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:30,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:30,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:30,832 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:30,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:30,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1507685829, now seen corresponding path program 1 times [2020-10-19 21:53:30,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:30,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841514743] [2020-10-19 21:53:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841514743] [2020-10-19 21:53:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787417059] [2020-10-19 21:53:31,091 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 [2020-10-19 21:53:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 21:53:31,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:31,203 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-19 21:53:31,204 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:31,210 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:31,211 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:31,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2020-10-19 21:53:31,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:31,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:31,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:31,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-19 21:53:31,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522486044] [2020-10-19 21:53:31,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 21:53:31,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:31,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 21:53:31,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-19 21:53:31,349 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 14 states. [2020-10-19 21:53:31,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:31,643 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-19 21:53:31,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 21:53:31,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-10-19 21:53:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:31,644 INFO L225 Difference]: With dead ends: 51 [2020-10-19 21:53:31,645 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 21:53:31,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-19 21:53:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 21:53:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2020-10-19 21:53:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-19 21:53:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-19 21:53:31,654 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2020-10-19 21:53:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:31,654 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-19 21:53:31,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 21:53:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-19 21:53:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 21:53:31,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:31,655 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:31,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:31,857 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -196707722, now seen corresponding path program 2 times [2020-10-19 21:53:31,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:31,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153770593] [2020-10-19 21:53:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:32,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153770593] [2020-10-19 21:53:32,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936765413] [2020-10-19 21:53:32,198 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 [2020-10-19 21:53:32,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:53:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 21:53:32,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:32,296 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:32,296 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:32,306 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:32,306 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:32,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-10-19 21:53:32,373 INFO L350 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2020-10-19 21:53:32,373 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2020-10-19 21:53:32,374 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:32,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:32,392 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 21:53:32,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:33 [2020-10-19 21:53:32,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:32,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:32,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:32,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:32,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-10-19 21:53:32,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923865154] [2020-10-19 21:53:32,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-19 21:53:32,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-19 21:53:32,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-19 21:53:32,626 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 18 states. [2020-10-19 21:53:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:33,620 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-19 21:53:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-19 21:53:33,620 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2020-10-19 21:53:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:33,622 INFO L225 Difference]: With dead ends: 58 [2020-10-19 21:53:33,622 INFO L226 Difference]: Without dead ends: 56 [2020-10-19 21:53:33,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2020-10-19 21:53:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-19 21:53:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 25. [2020-10-19 21:53:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-19 21:53:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-19 21:53:33,630 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 24 [2020-10-19 21:53:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:33,631 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-19 21:53:33,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-19 21:53:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-19 21:53:33,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 21:53:33,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:33,632 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:33,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:33,848 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:33,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:33,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1836571567, now seen corresponding path program 3 times [2020-10-19 21:53:33,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:33,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141486434] [2020-10-19 21:53:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:33,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141486434] [2020-10-19 21:53:33,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128517701] [2020-10-19 21:53:33,934 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 [2020-10-19 21:53:33,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 21:53:33,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:53:33,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 21:53:33,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:34,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:34,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-19 21:53:34,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563879453] [2020-10-19 21:53:34,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 21:53:34,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:53:34,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 21:53:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-19 21:53:34,042 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 12 states. [2020-10-19 21:53:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:34,177 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-10-19 21:53:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 21:53:34,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-19 21:53:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:34,178 INFO L225 Difference]: With dead ends: 66 [2020-10-19 21:53:34,179 INFO L226 Difference]: Without dead ends: 33 [2020-10-19 21:53:34,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-19 21:53:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-19 21:53:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-19 21:53:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 21:53:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-19 21:53:34,186 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2020-10-19 21:53:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:34,186 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-19 21:53:34,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 21:53:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-19 21:53:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 21:53:34,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:34,188 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:34,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:34,400 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash 727922282, now seen corresponding path program 4 times [2020-10-19 21:53:34,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:34,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950099568] [2020-10-19 21:53:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:53:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:34,456 ERROR L253 erpolLogProxyWrapper]: Interpolant 13 not inductive [2020-10-19 21:53:34,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 21:53:34,467 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:55) [2020-10-19 21:53:34,474 INFO L168 Benchmark]: Toolchain (without parser) took 10914.90 ms. Allocated memory was 39.3 MB in the beginning and 68.7 MB in the end (delta: 29.4 MB). Free memory was 17.2 MB in the beginning and 27.2 MB in the end (delta: -10.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:34,475 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 30.4 MB. Free memory was 6.6 MB in the beginning and 6.6 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. [2020-10-19 21:53:34,476 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.83 ms. Allocated memory was 39.3 MB in the beginning and 40.4 MB in the end (delta: 1.0 MB). Free memory was 16.3 MB in the beginning and 17.7 MB in the end (delta: -1.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:34,477 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.99 ms. Allocated memory is still 40.4 MB. Free memory was 17.7 MB in the beginning and 16.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:34,477 INFO L168 Benchmark]: Boogie Preprocessor took 27.33 ms. Allocated memory is still 40.4 MB. Free memory was 16.0 MB in the beginning and 14.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:34,478 INFO L168 Benchmark]: RCFGBuilder took 311.86 ms. Allocated memory was 40.4 MB in the beginning and 41.9 MB in the end (delta: 1.6 MB). Free memory was 14.5 MB in the beginning and 15.9 MB in the end (delta: -1.4 MB). Peak memory consumption was 4.6 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:34,479 INFO L168 Benchmark]: TraceAbstraction took 10221.77 ms. Allocated memory was 41.9 MB in the beginning and 68.7 MB in the end (delta: 26.7 MB). Free memory was 15.2 MB in the beginning and 27.2 MB in the end (delta: -12.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:34,484 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 30.4 MB. Free memory was 6.6 MB in the beginning and 6.6 MB in the end (delta: 44.0 kB). Peak memory consumption was 44.0 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 301.83 ms. Allocated memory was 39.3 MB in the beginning and 40.4 MB in the end (delta: 1.0 MB). Free memory was 16.3 MB in the beginning and 17.7 MB in the end (delta: -1.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 40.99 ms. Allocated memory is still 40.4 MB. Free memory was 17.7 MB in the beginning and 16.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 27.33 ms. Allocated memory is still 40.4 MB. Free memory was 16.0 MB in the beginning and 14.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 311.86 ms. Allocated memory was 40.4 MB in the beginning and 41.9 MB in the end (delta: 1.6 MB). Free memory was 14.5 MB in the beginning and 15.9 MB in the end (delta: -1.4 MB). Peak memory consumption was 4.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 10221.77 ms. Allocated memory was 41.9 MB in the beginning and 68.7 MB in the end (delta: 26.7 MB). Free memory was 15.2 MB in the beginning and 27.2 MB in the end (delta: -12.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.3 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 0.1.25-9a8b2e8 [2020-10-19 21:53:36,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 21:53:36,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 21:53:36,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 21:53:36,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 21:53:36,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 21:53:36,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 21:53:36,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 21:53:36,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 21:53:36,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 21:53:36,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 21:53:36,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 21:53:36,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 21:53:36,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 21:53:36,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 21:53:36,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 21:53:36,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 21:53:36,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 21:53:36,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 21:53:36,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 21:53:36,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 21:53:36,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 21:53:36,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 21:53:36,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 21:53:36,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 21:53:36,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 21:53:36,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 21:53:36,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 21:53:36,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 21:53:36,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 21:53:36,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 21:53:36,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 21:53:36,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 21:53:36,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 21:53:36,804 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 21:53:36,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 21:53:36,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 21:53:36,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 21:53:36,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 21:53:36,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 21:53:36,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 21:53:36,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-19 21:53:36,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 21:53:36,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 21:53:36,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 21:53:36,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 21:53:36,858 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 21:53:36,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 21:53:36,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 21:53:36,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 21:53:36,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 21:53:36,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 21:53:36,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 21:53:36,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 21:53:36,861 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-19 21:53:36,862 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-19 21:53:36,862 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 21:53:36,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 21:53:36,863 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 21:53:36,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 21:53:36,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 21:53:36,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 21:53:36,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 21:53:36,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 21:53:36,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 21:53:36,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 21:53:36,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 21:53:36,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 21:53:36,865 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-19 21:53:36,865 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-19 21:53:36,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 21:53:36,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 21:53:36,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-19 21:53:36,866 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> eb1f6cdae01d4f2907bde137e48a0b4cd3cd463e [2020-10-19 21:53:37,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 21:53:37,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 21:53:37,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 21:53:37,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 21:53:37,153 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 21:53:37,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rew.c [2020-10-19 21:53:37,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfd59811a/fa31f86bc9d54c40804893e4bd3bda0c/FLAG19de5cdab [2020-10-19 21:53:37,722 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 21:53:37,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c [2020-10-19 21:53:37,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfd59811a/fa31f86bc9d54c40804893e4bd3bda0c/FLAG19de5cdab [2020-10-19 21:53:38,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfd59811a/fa31f86bc9d54c40804893e4bd3bda0c [2020-10-19 21:53:38,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 21:53:38,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 21:53:38,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:38,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 21:53:38,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 21:53:38,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69873113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38, skipping insertion in model container [2020-10-19 21:53:38,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 21:53:38,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 21:53:38,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:38,451 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 21:53:38,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:38,493 INFO L208 MainTranslator]: Completed translation [2020-10-19 21:53:38,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38 WrapperNode [2020-10-19 21:53:38,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:38,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:38,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 21:53:38,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 21:53:38,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,538 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:38,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 21:53:38,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 21:53:38,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 21:53:38,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (1/1) ... [2020-10-19 21:53:38,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 21:53:38,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 21:53:38,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 21:53:38,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 21:53:38,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (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 [2020-10-19 21:53:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-19 21:53:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 21:53:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 21:53:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-19 21:53:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 21:53:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 21:53:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-19 21:53:38,982 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 21:53:38,982 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-19 21:53:38,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:38 BoogieIcfgContainer [2020-10-19 21:53:38,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 21:53:38,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 21:53:38,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 21:53:38,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 21:53:38,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 09:53:38" (1/3) ... [2020-10-19 21:53:38,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46821417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:38, skipping insertion in model container [2020-10-19 21:53:38,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:38" (2/3) ... [2020-10-19 21:53:38,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46821417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:38, skipping insertion in model container [2020-10-19 21:53:38,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:38" (3/3) ... [2020-10-19 21:53:38,995 INFO L111 eAbstractionObserver]: Analyzing ICFG rew.c [2020-10-19 21:53:39,008 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 21:53:39,016 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 21:53:39,031 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 21:53:39,053 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 21:53:39,053 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 21:53:39,054 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 21:53:39,054 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 21:53:39,054 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 21:53:39,054 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 21:53:39,054 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 21:53:39,055 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 21:53:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-19 21:53:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 21:53:39,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:39,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:39,083 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:39,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:39,089 INFO L82 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2020-10-19 21:53:39,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:39,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030772430] [2020-10-19 21:53:39,105 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 [2020-10-19 21:53:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:39,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-19 21:53:39,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:39,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:39,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030772430] [2020-10-19 21:53:39,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:39,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 21:53:39,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407305012] [2020-10-19 21:53:39,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 21:53:39,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 21:53:39,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 21:53:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:53:39,246 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-19 21:53:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:39,261 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-10-19 21:53:39,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 21:53:39,262 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-19 21:53:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:39,271 INFO L225 Difference]: With dead ends: 30 [2020-10-19 21:53:39,271 INFO L226 Difference]: Without dead ends: 14 [2020-10-19 21:53:39,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:53:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-19 21:53:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-19 21:53:39,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-19 21:53:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-19 21:53:39,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-10-19 21:53:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:39,322 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-19 21:53:39,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 21:53:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-19 21:53:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 21:53:39,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:39,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:39,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 21:53:39,536 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:39,536 INFO L82 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2020-10-19 21:53:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:39,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480303080] [2020-10-19 21:53:39,538 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 [2020-10-19 21:53:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 21:53:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:39,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:39,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480303080] [2020-10-19 21:53:39,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:39,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-19 21:53:39,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102205845] [2020-10-19 21:53:39,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:53:39,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 21:53:39,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:53:39,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:53:39,702 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-10-19 21:53:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:39,845 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2020-10-19 21:53:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:53:39,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-19 21:53:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:39,847 INFO L225 Difference]: With dead ends: 30 [2020-10-19 21:53:39,847 INFO L226 Difference]: Without dead ends: 19 [2020-10-19 21:53:39,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:53:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-19 21:53:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-19 21:53:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 21:53:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 21:53:39,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2020-10-19 21:53:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:39,855 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 21:53:39,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:53:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 21:53:39,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:53:39,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:39,856 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:40,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-19 21:53:40,071 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:40,071 INFO L82 PathProgramCache]: Analyzing trace with hash -211811063, now seen corresponding path program 1 times [2020-10-19 21:53:40,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:40,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880445844] [2020-10-19 21:53:40,072 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 [2020-10-19 21:53:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:40,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 21:53:40,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:40,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 21:53:40,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880445844] [2020-10-19 21:53:40,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:53:40,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2020-10-19 21:53:40,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573656951] [2020-10-19 21:53:40,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:53:40,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 21:53:40,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:53:40,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-19 21:53:40,298 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-19 21:53:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:40,420 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-19 21:53:40,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:53:40,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-19 21:53:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:40,422 INFO L225 Difference]: With dead ends: 29 [2020-10-19 21:53:40,422 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 21:53:40,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:53:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 21:53:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-10-19 21:53:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 21:53:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 21:53:40,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-19 21:53:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:40,430 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 21:53:40,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:53:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 21:53:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:53:40,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:40,432 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:40,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-19 21:53:40,633 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:40,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2020-10-19 21:53:40,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:40,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022564179] [2020-10-19 21:53:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:53:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 21:53:40,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:40,790 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 21:53:40,791 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:40,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:40,807 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:40,808 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-10-19 21:53:40,878 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-10-19 21:53:40,879 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2020-10-19 21:53:40,880 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:40,894 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:40,894 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:40,895 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2020-10-19 21:53:40,977 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:53:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:41,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:41,226 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 22 treesize of output 20 [2020-10-19 21:53:41,232 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 70 [2020-10-19 21:53:41,235 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 21:53:41,345 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2020-10-19 21:53:41,346 INFO L625 ElimStorePlain]: treesize reduction 23, result has 67.1 percent of original size [2020-10-19 21:53:41,348 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 21:53:41,389 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:41,393 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,394 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-10-19 21:53:41,395 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,397 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,402 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-10-19 21:53:41,403 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,407 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,409 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-19 21:53:41,409 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:22, output treesize:47 [2020-10-19 21:53:41,410 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-10-19 21:53:41,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,413 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,416 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-10-19 21:53:41,418 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,420 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-19 21:53:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:41,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022564179] [2020-10-19 21:53:41,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:53:41,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-19 21:53:41,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472486328] [2020-10-19 21:53:41,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 21:53:41,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 21:53:41,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 21:53:41,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-19 21:53:41,722 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 14 states. [2020-10-19 21:53:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:53:47,748 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2020-10-19 21:53:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-19 21:53:47,749 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-10-19 21:53:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:53:47,752 INFO L225 Difference]: With dead ends: 79 [2020-10-19 21:53:47,752 INFO L226 Difference]: Without dead ends: 77 [2020-10-19 21:53:47,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2020-10-19 21:53:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-19 21:53:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2020-10-19 21:53:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-19 21:53:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-19 21:53:47,764 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 16 [2020-10-19 21:53:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:53:47,764 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-19 21:53:47,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 21:53:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-19 21:53:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 21:53:47,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:47,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:47,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-19 21:53:47,976 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1507685829, now seen corresponding path program 1 times [2020-10-19 21:53:47,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 21:53:47,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089672978] [2020-10-19 21:53:47,978 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 [2020-10-19 21:53:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:48,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 21:53:48,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:48,139 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-19 21:53:48,139 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:48,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:48,154 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:48,155 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-10-19 21:53:48,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:48,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:48,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089672978] [2020-10-19 21:53:48,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 21:53:48,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727074884] [2020-10-19 21:53:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 21:53:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 21:53:48,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:48,480 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-19 21:53:48,480 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:48,495 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:48,496 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:48,496 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-19 21:53:48,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:48,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:48,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 21:53:48,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598717594] [2020-10-19 21:53:48,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 21:53:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:53:48,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 21:53:48,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:53:48,710 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-19 21:53:48,710 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:53:48,721 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:53:48,721 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:53:48,722 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-10-19 21:53:48,897 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-10-19 21:53:48,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:48,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:53:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:53:48,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 21:53:48,924 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 21:53:48,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:53:48,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-19 21:53:48,925 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-19 21:53:48,925 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 21:53:49,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 mathsat -unsat_core_generation=3,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:53:49,553 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-19 21:53:49,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 09:53:49 BoogieIcfgContainer [2020-10-19 21:53:49,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 21:53:49,555 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 21:53:49,555 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 21:53:49,555 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 21:53:49,556 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:38" (3/4) ... [2020-10-19 21:53:49,560 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 21:53:49,560 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 21:53:49,562 INFO L168 Benchmark]: Toolchain (without parser) took 11425.81 ms. Allocated memory was 41.9 MB in the beginning and 52.4 MB in the end (delta: 10.5 MB). Free memory was 20.2 MB in the beginning and 12.6 MB in the end (delta: 7.6 MB). Peak memory consumption was 18.1 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:49,562 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 31.5 MB. Free memory was 8.7 MB in the beginning and 8.6 MB in the end (delta: 45.6 kB). Peak memory consumption was 45.6 kB. Max. memory is 14.3 GB. [2020-10-19 21:53:49,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.84 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.3 MB in the beginning and 18.8 MB in the end (delta: 494.4 kB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:49,564 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.69 ms. Allocated memory is still 42.5 MB. Free memory was 18.8 MB in the beginning and 17.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:49,565 INFO L168 Benchmark]: Boogie Preprocessor took 30.42 ms. Allocated memory is still 42.5 MB. Free memory was 17.0 MB in the beginning and 15.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:49,566 INFO L168 Benchmark]: RCFGBuilder took 414.53 ms. Allocated memory was 42.5 MB in the beginning and 43.5 MB in the end (delta: 1.0 MB). Free memory was 15.5 MB in the beginning and 15.9 MB in the end (delta: -459.6 kB). Peak memory consumption was 4.6 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:49,567 INFO L168 Benchmark]: TraceAbstraction took 10568.69 ms. Allocated memory was 43.5 MB in the beginning and 52.4 MB in the end (delta: 8.9 MB). Free memory was 15.5 MB in the beginning and 13.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. [2020-10-19 21:53:49,567 INFO L168 Benchmark]: Witness Printer took 5.54 ms. Allocated memory is still 52.4 MB. Free memory was 13.1 MB in the beginning and 12.6 MB in the end (delta: 523.2 kB). Peak memory consumption was 523.2 kB. Max. memory is 14.3 GB. [2020-10-19 21:53:49,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 31.5 MB. Free memory was 8.7 MB in the beginning and 8.6 MB in the end (delta: 45.6 kB). Peak memory consumption was 45.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 352.84 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.3 MB in the beginning and 18.8 MB in the end (delta: 494.4 kB). Peak memory consumption was 9.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 44.69 ms. Allocated memory is still 42.5 MB. Free memory was 18.8 MB in the beginning and 17.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 30.42 ms. Allocated memory is still 42.5 MB. Free memory was 17.0 MB in the beginning and 15.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 414.53 ms. Allocated memory was 42.5 MB in the beginning and 43.5 MB in the end (delta: 1.0 MB). Free memory was 15.5 MB in the beginning and 15.9 MB in the end (delta: -459.6 kB). Peak memory consumption was 4.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 10568.69 ms. Allocated memory was 43.5 MB in the beginning and 52.4 MB in the end (delta: 8.9 MB). Free memory was 15.5 MB in the beginning and 13.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. * Witness Printer took 5.54 ms. Allocated memory is still 52.4 MB. Free memory was 13.1 MB in the beginning and 12.6 MB in the end (delta: 523.2 kB). Peak memory consumption was 523.2 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L12] int SIZE; [L14] const int MAX = 100000; [L18] SIZE = __VERIFIER_nondet_int() [L19] COND TRUE SIZE > 1 && SIZE < MAX [L21] int i; [L22] int *a = malloc(sizeof(int)*SIZE); [L23] int val2 = 3; [L24] int val1 = 0; [L25] int low=2; [L27] i = 0 [L27] COND TRUE i < SIZE [L29] COND TRUE i+1 < SIZE [L31] a[i+1] = val1 [L33] a[i] = val2 [L27] i++ [L27] COND TRUE i < SIZE [L29] COND FALSE !(i+1 < SIZE) [L33] a[i] = val2 [L27] i++ [L27] COND FALSE !(i < SIZE) [L36] i = 0 [L36] COND TRUE i < SIZE [L38] a[i] [L8] COND FALSE !(!(cond)) [L36] i++ [L36] COND TRUE i < SIZE [L38] a[i] [L8] COND TRUE !(cond) [L3] __assert_fail("0", "rew.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 10.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49 SDtfs, 117 SDslu, 75 SDs, 0 SdLazy, 241 SolverSat, 49 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=4, 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, 4 MinimizatonAttempts, 40 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 88 ConstructedInterpolants, 3 QuantifiedInterpolants, 8999 SizeOfPredicates, 20 NumberOfNonLiveVariables, 227 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 6/24 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...