./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/condg.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-fpi/condg.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 dd2e7fd6066e4d59e33069b5c0266fcf92501368 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-fpi/condg.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 dd2e7fd6066e4d59e33069b5c0266fcf92501368 ................................................................................................................................................................................................................................................................................................................................................................................................................. 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 22:11:01,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:11:01,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:11:01,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:11:01,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:11:01,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:11:01,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:11:01,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:11:01,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:11:01,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:11:01,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:11:01,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:11:01,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:11:01,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:11:01,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:11:01,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:11:01,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:11:01,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:11:01,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:11:01,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:11:01,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:11:01,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:11:01,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:11:01,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:11:01,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:11:01,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:11:01,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:11:01,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:11:01,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:11:01,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:11:01,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:11:01,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:11:01,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:11:01,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:11:01,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:11:01,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:11:01,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:11:01,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:11:01,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:11:01,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:11:01,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:11:01,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:11:01,994 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:11:01,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:11:01,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:11:01,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:11:01,996 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:11:01,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:11:01,997 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:11:01,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:11:01,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:11:01,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:11:01,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:11:01,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:11:01,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:11:01,999 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:11:01,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:11:01,999 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:11:01,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:11:02,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:11:02,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:11:02,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:11:02,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:11:02,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:11:02,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:11:02,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:11:02,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:11:02,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:11:02,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:11:02,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:11:02,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:11:02,003 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 -> dd2e7fd6066e4d59e33069b5c0266fcf92501368 [2020-10-19 22:11:02,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:11:02,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:11:02,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:11:02,237 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:11:02,238 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:11:02,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condg.c [2020-10-19 22:11:02,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1deecfd71/c5f52df8365a4f868499922eafe66ba6/FLAG0636722af [2020-10-19 22:11:02,756 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:11:02,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condg.c [2020-10-19 22:11:02,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1deecfd71/c5f52df8365a4f868499922eafe66ba6/FLAG0636722af [2020-10-19 22:11:03,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1deecfd71/c5f52df8365a4f868499922eafe66ba6 [2020-10-19 22:11:03,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:11:03,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:11:03,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:03,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:11:03,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:11:03,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d59dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03, skipping insertion in model container [2020-10-19 22:11:03,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:11:03,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:11:03,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:03,516 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:11:03,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:03,558 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:11:03,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03 WrapperNode [2020-10-19 22:11:03,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:03,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:03,560 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:11:03,560 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:11:03,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,576 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:03,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:11:03,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:11:03,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:11:03,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (1/1) ... [2020-10-19 22:11:03,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:11:03,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:11:03,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:11:03,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:11:03,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (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 22:11:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:11:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:11:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:11:03,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:11:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:11:03,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:11:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:11:03,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:11:04,072 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:11:04,073 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-10-19 22:11:04,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:04 BoogieIcfgContainer [2020-10-19 22:11:04,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:11:04,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:11:04,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:11:04,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:11:04,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:11:03" (1/3) ... [2020-10-19 22:11:04,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae99145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:04, skipping insertion in model container [2020-10-19 22:11:04,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:03" (2/3) ... [2020-10-19 22:11:04,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae99145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:04, skipping insertion in model container [2020-10-19 22:11:04,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:04" (3/3) ... [2020-10-19 22:11:04,084 INFO L111 eAbstractionObserver]: Analyzing ICFG condg.c [2020-10-19 22:11:04,097 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:11:04,103 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:11:04,114 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:11:04,141 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:11:04,142 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:11:04,142 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:11:04,142 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:11:04,143 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:11:04,143 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:11:04,143 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:11:04,143 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:11:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-19 22:11:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:11:04,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:04,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:04,167 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:04,174 INFO L82 PathProgramCache]: Analyzing trace with hash -592817118, now seen corresponding path program 1 times [2020-10-19 22:11:04,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:04,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177230045] [2020-10-19 22:11:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:04,335 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 22:11:04,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177230045] [2020-10-19 22:11:04,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:04,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:11:04,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044787223] [2020-10-19 22:11:04,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:11:04,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:04,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:11:04,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:11:04,361 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-10-19 22:11:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:04,378 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2020-10-19 22:11:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:11:04,379 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-19 22:11:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:04,388 INFO L225 Difference]: With dead ends: 47 [2020-10-19 22:11:04,388 INFO L226 Difference]: Without dead ends: 21 [2020-10-19 22:11:04,395 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 22:11:04,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-19 22:11:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-19 22:11:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-19 22:11:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-19 22:11:04,422 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-10-19 22:11:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:04,423 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-19 22:11:04,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:11:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-19 22:11:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:11:04,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:04,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:04,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:11:04,424 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 108247460, now seen corresponding path program 1 times [2020-10-19 22:11:04,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:04,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557527979] [2020-10-19 22:11:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:04,518 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 22:11:04,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557527979] [2020-10-19 22:11:04,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:04,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:11:04,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281553143] [2020-10-19 22:11:04,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:11:04,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:04,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:11:04,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:11:04,524 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2020-10-19 22:11:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:04,614 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-10-19 22:11:04,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:11:04,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-19 22:11:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:04,617 INFO L225 Difference]: With dead ends: 48 [2020-10-19 22:11:04,617 INFO L226 Difference]: Without dead ends: 34 [2020-10-19 22:11:04,618 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 22:11:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-19 22:11:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-10-19 22:11:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 22:11:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-19 22:11:04,626 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-10-19 22:11:04,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:04,626 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-19 22:11:04,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:11:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-19 22:11:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:11:04,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:04,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:04,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:11:04,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1242970242, now seen corresponding path program 1 times [2020-10-19 22:11:04,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:04,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332223704] [2020-10-19 22:11:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:05,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332223704] [2020-10-19 22:11:05,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728426499] [2020-10-19 22:11:05,006 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 22:11:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:05,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-19 22:11:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:05,192 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 11 treesize of output 7 [2020-10-19 22:11:05,193 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:05,204 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:05,204 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:05,205 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-10-19 22:11:05,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:05,245 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-19 22:11:05,247 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:05,260 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:05,261 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:05,261 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-10-19 22:11:05,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:05,418 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2020-10-19 22:11:05,420 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:05,434 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:05,435 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:05,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:34 [2020-10-19 22:11:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:05,674 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2020-10-19 22:11:05,675 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:05,696 INFO L625 ElimStorePlain]: treesize reduction 7, result has 82.5 percent of original size [2020-10-19 22:11:05,700 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 22:11:05,701 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2020-10-19 22:11:05,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:05,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:05,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:05,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:05,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:05,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:05,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:05,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:05,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:05,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:05,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2020-10-19 22:11:05,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050953757] [2020-10-19 22:11:05,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-19 22:11:05,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-19 22:11:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-10-19 22:11:05,971 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 21 states. [2020-10-19 22:11:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:07,232 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-10-19 22:11:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-19 22:11:07,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2020-10-19 22:11:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:07,237 INFO L225 Difference]: With dead ends: 78 [2020-10-19 22:11:07,237 INFO L226 Difference]: Without dead ends: 68 [2020-10-19 22:11:07,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=291, Invalid=1689, Unknown=0, NotChecked=0, Total=1980 [2020-10-19 22:11:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-19 22:11:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2020-10-19 22:11:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 22:11:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-19 22:11:07,265 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2020-10-19 22:11:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:07,266 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-19 22:11:07,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-19 22:11:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-19 22:11:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 22:11:07,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:07,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:07,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:11:07,477 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:07,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1912499326, now seen corresponding path program 1 times [2020-10-19 22:11:07,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:07,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336863474] [2020-10-19 22:11:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:07,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336863474] [2020-10-19 22:11:07,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262137419] [2020-10-19 22:11:07,554 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 22:11:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:11:07,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:07,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:07,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:11:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443335655] [2020-10-19 22:11:07,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:11:07,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:11:07,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:11:07,649 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 10 states. [2020-10-19 22:11:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:07,838 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-10-19 22:11:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:11:07,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-19 22:11:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:07,839 INFO L225 Difference]: With dead ends: 96 [2020-10-19 22:11:07,840 INFO L226 Difference]: Without dead ends: 60 [2020-10-19 22:11:07,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-19 22:11:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-19 22:11:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-10-19 22:11:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 22:11:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-19 22:11:07,849 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 23 [2020-10-19 22:11:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:07,850 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-19 22:11:07,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:11:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-19 22:11:07,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 22:11:07,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:07,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:08,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:08,065 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2059193154, now seen corresponding path program 2 times [2020-10-19 22:11:08,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:08,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193360181] [2020-10-19 22:11:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:08,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193360181] [2020-10-19 22:11:08,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385603350] [2020-10-19 22:11:08,148 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 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 22:11:08,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:11:08,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:11:08,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:11:08,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:08,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:08,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:11:08,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089001110] [2020-10-19 22:11:08,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:11:08,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:11:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:11:08,262 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 10 states. [2020-10-19 22:11:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:08,421 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-19 22:11:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:11:08,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-10-19 22:11:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:08,422 INFO L225 Difference]: With dead ends: 58 [2020-10-19 22:11:08,422 INFO L226 Difference]: Without dead ends: 48 [2020-10-19 22:11:08,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-19 22:11:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-19 22:11:08,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-19 22:11:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-19 22:11:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-19 22:11:08,429 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2020-10-19 22:11:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:08,430 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-19 22:11:08,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:11:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-19 22:11:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 22:11:08,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:08,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:08,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:08,632 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:08,632 INFO L82 PathProgramCache]: Analyzing trace with hash 943879772, now seen corresponding path program 2 times [2020-10-19 22:11:08,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:08,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572205565] [2020-10-19 22:11:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 22:11:08,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572205565] [2020-10-19 22:11:08,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945114509] [2020-10-19 22:11:08,963 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 22:11:09,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:11:09,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:11:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-19 22:11:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:09,044 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 22:11:09,045 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:09,051 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:09,051 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:09,051 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-10-19 22:11:09,101 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:09,101 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 23 treesize of output 46 [2020-10-19 22:11:09,102 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:09,121 INFO L625 ElimStorePlain]: treesize reduction 24, result has 52.9 percent of original size [2020-10-19 22:11:09,122 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 22:11:09,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2020-10-19 22:11:09,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:09,930 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:09,931 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 46 [2020-10-19 22:11:09,932 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:09,953 INFO L625 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2020-10-19 22:11:09,954 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 22:11:09,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:27 [2020-10-19 22:11:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:10,512 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:10,513 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 85 [2020-10-19 22:11:10,515 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:10,539 INFO L625 ElimStorePlain]: treesize reduction 72, result has 27.3 percent of original size [2020-10-19 22:11:10,542 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 22:11:10,542 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:22 [2020-10-19 22:11:13,331 INFO L350 Elim1Store]: treesize reduction 12, result has 90.2 percent of original size [2020-10-19 22:11:13,331 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 130 [2020-10-19 22:11:13,333 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:13,381 INFO L625 ElimStorePlain]: treesize reduction 118, result has 20.8 percent of original size [2020-10-19 22:11:13,382 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 22:11:13,382 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:31 [2020-10-19 22:11:13,544 INFO L350 Elim1Store]: treesize reduction 12, result has 90.2 percent of original size [2020-10-19 22:11:13,545 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 130 [2020-10-19 22:11:13,546 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:13,593 INFO L625 ElimStorePlain]: treesize reduction 86, result has 42.3 percent of original size [2020-10-19 22:11:13,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:13,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:13,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:13,605 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 22:11:13,605 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:63 [2020-10-19 22:11:13,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:13,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:13,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:15,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:15,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:15,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:15,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:16,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:16,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:16,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:16,118 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:16,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:16,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:16,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:16,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:16,854 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-10-19 22:11:16,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:16,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:16,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:16,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:16,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2020-10-19 22:11:16,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429063435] [2020-10-19 22:11:16,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-19 22:11:16,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:16,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-19 22:11:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=472, Unknown=10, NotChecked=0, Total=552 [2020-10-19 22:11:16,945 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 24 states. [2020-10-19 22:11:19,605 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-10-19 22:11:20,433 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-19 22:11:23,390 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-19 22:11:28,313 WARN L193 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-10-19 22:11:33,422 WARN L193 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-19 22:11:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:38,273 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-19 22:11:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-19 22:11:38,278 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-19 22:11:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:38,279 INFO L225 Difference]: With dead ends: 66 [2020-10-19 22:11:38,280 INFO L226 Difference]: Without dead ends: 64 [2020-10-19 22:11:38,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=201, Invalid=1340, Unknown=19, NotChecked=0, Total=1560 [2020-10-19 22:11:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-19 22:11:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2020-10-19 22:11:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-19 22:11:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-19 22:11:38,300 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2020-10-19 22:11:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:38,301 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-19 22:11:38,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-19 22:11:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-19 22:11:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 22:11:38,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:38,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:38,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:38,504 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:38,505 INFO L82 PathProgramCache]: Analyzing trace with hash 550852762, now seen corresponding path program 1 times [2020-10-19 22:11:38,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:38,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109958010] [2020-10-19 22:11:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 22:11:38,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109958010] [2020-10-19 22:11:38,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27515773] [2020-10-19 22:11:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:11:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 22:11:38,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:38,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:38,740 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2020-10-19 22:11:38,741 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:38,744 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:38,744 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 22:11:38,744 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:5 [2020-10-19 22:11:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:38,767 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2020-10-19 22:11:38,768 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:38,773 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:38,775 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:38,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:8 [2020-10-19 22:11:38,780 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 16 treesize of output 8 [2020-10-19 22:11:38,781 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:38,783 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:38,784 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:38,784 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:4 [2020-10-19 22:11:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 22:11:38,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:11:38,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-10-19 22:11:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547070532] [2020-10-19 22:11:38,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 22:11:38,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:38,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 22:11:38,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-19 22:11:38,789 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 8 states. [2020-10-19 22:11:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:38,878 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-19 22:11:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 22:11:38,879 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-19 22:11:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:38,880 INFO L225 Difference]: With dead ends: 64 [2020-10-19 22:11:38,880 INFO L226 Difference]: Without dead ends: 54 [2020-10-19 22:11:38,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:11:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-19 22:11:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2020-10-19 22:11:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-19 22:11:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-10-19 22:11:38,889 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 28 [2020-10-19 22:11:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:38,889 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-10-19 22:11:38,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 22:11:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-10-19 22:11:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 22:11:38,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:38,891 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:39,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-19 22:11:39,106 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:39,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1969107172, now seen corresponding path program 3 times [2020-10-19 22:11:39,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:39,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101412189] [2020-10-19 22:11:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:39,274 ERROR L253 erpolLogProxyWrapper]: Interpolant 13 not inductive [2020-10-19 22:11:39,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 22:11:39,288 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 22:11:39,296 INFO L168 Benchmark]: Toolchain (without parser) took 36123.90 ms. Allocated memory was 34.1 MB in the beginning and 70.3 MB in the end (delta: 36.2 MB). Free memory was 11.1 MB in the beginning and 45.4 MB in the end (delta: -34.3 MB). Peak memory consumption was 39.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:39,297 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 33.6 MB. Free memory was 18.9 MB in the beginning and 18.8 MB in the end (delta: 54.3 kB). Peak memory consumption was 54.3 kB. Max. memory is 14.3 GB. [2020-10-19 22:11:39,298 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.04 ms. Allocated memory was 34.1 MB in the beginning and 41.9 MB in the end (delta: 7.9 MB). Free memory was 10.3 MB in the beginning and 24.3 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:39,301 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.19 ms. Allocated memory is still 41.9 MB. Free memory was 24.3 MB in the beginning and 22.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:39,302 INFO L168 Benchmark]: Boogie Preprocessor took 32.34 ms. Allocated memory is still 41.9 MB. Free memory was 22.5 MB in the beginning and 21.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:39,303 INFO L168 Benchmark]: RCFGBuilder took 438.99 ms. Allocated memory is still 41.9 MB. Free memory was 20.8 MB in the beginning and 14.7 MB in the end (delta: 6.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:39,303 INFO L168 Benchmark]: TraceAbstraction took 35215.32 ms. Allocated memory was 41.9 MB in the beginning and 70.3 MB in the end (delta: 28.3 MB). Free memory was 14.3 MB in the beginning and 45.4 MB in the end (delta: -31.1 MB). Peak memory consumption was 34.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:39,307 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 33.6 MB. Free memory was 18.9 MB in the beginning and 18.8 MB in the end (delta: 54.3 kB). Peak memory consumption was 54.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 384.04 ms. Allocated memory was 34.1 MB in the beginning and 41.9 MB in the end (delta: 7.9 MB). Free memory was 10.3 MB in the beginning and 24.3 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 43.19 ms. Allocated memory is still 41.9 MB. Free memory was 24.3 MB in the beginning and 22.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 32.34 ms. Allocated memory is still 41.9 MB. Free memory was 22.5 MB in the beginning and 21.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 438.99 ms. Allocated memory is still 41.9 MB. Free memory was 20.8 MB in the beginning and 14.7 MB in the end (delta: 6.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 35215.32 ms. Allocated memory was 41.9 MB in the beginning and 70.3 MB in the end (delta: 28.3 MB). Free memory was 14.3 MB in the beginning and 45.4 MB in the end (delta: -31.1 MB). Peak memory consumption was 34.8 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 22:11:41,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:11:41,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:11:41,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:11:41,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:11:41,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:11:41,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:11:41,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:11:41,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:11:41,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:11:41,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:11:41,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:11:41,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:11:41,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:11:41,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:11:41,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:11:41,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:11:41,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:11:41,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:11:41,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:11:41,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:11:41,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:11:41,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:11:41,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:11:41,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:11:41,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:11:41,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:11:41,747 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:11:41,747 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:11:41,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:11:41,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:11:41,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:11:41,750 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:11:41,751 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:11:41,752 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:11:41,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:11:41,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:11:41,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:11:41,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:11:41,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:11:41,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:11:41,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-19 22:11:41,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:11:41,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:11:41,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:11:41,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:11:41,779 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:11:41,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:11:41,780 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:11:41,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:11:41,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:11:41,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:11:41,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:11:41,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:11:41,781 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-19 22:11:41,782 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-19 22:11:41,782 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:11:41,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:11:41,782 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:11:41,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:11:41,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:11:41,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:11:41,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:11:41,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:11:41,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:11:41,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:11:41,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:11:41,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:11:41,785 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-19 22:11:41,785 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-19 22:11:41,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:11:41,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:11:41,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-19 22:11:41,789 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 -> dd2e7fd6066e4d59e33069b5c0266fcf92501368 [2020-10-19 22:11:42,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:11:42,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:11:42,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:11:42,018 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:11:42,019 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:11:42,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/condg.c [2020-10-19 22:11:42,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21fb942bf/6c9b06709ae840c8b6c7330aeadf4735/FLAG0083ad10c [2020-10-19 22:11:42,562 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:11:42,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/condg.c [2020-10-19 22:11:42,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21fb942bf/6c9b06709ae840c8b6c7330aeadf4735/FLAG0083ad10c [2020-10-19 22:11:42,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21fb942bf/6c9b06709ae840c8b6c7330aeadf4735 [2020-10-19 22:11:42,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:11:42,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:11:42,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:42,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:11:42,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:11:42,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:42" (1/1) ... [2020-10-19 22:11:42,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d0856d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:42, skipping insertion in model container [2020-10-19 22:11:42,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:42" (1/1) ... [2020-10-19 22:11:42,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:11:42,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:11:43,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:43,355 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:11:43,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:43,436 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:11:43,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43 WrapperNode [2020-10-19 22:11:43,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:43,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:43,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:11:43,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:11:43,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,489 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:43,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:11:43,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:11:43,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:11:43,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (1/1) ... [2020-10-19 22:11:43,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:11:43,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:11:43,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:11:43,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:11:43,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (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 22:11:43,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-19 22:11:43,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:11:43,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:11:43,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-19 22:11:43,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:11:43,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:11:43,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:11:43,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-19 22:11:44,005 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:11:44,006 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-10-19 22:11:44,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:44 BoogieIcfgContainer [2020-10-19 22:11:44,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:11:44,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:11:44,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:11:44,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:11:44,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:11:42" (1/3) ... [2020-10-19 22:11:44,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3031ca03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:44, skipping insertion in model container [2020-10-19 22:11:44,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:43" (2/3) ... [2020-10-19 22:11:44,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3031ca03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:44, skipping insertion in model container [2020-10-19 22:11:44,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:44" (3/3) ... [2020-10-19 22:11:44,024 INFO L111 eAbstractionObserver]: Analyzing ICFG condg.c [2020-10-19 22:11:44,041 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:11:44,061 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:11:44,083 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:11:44,115 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:11:44,115 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:11:44,116 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:11:44,116 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:11:44,117 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:11:44,117 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:11:44,117 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:11:44,117 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:11:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-19 22:11:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:11:44,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:44,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:44,146 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash -592817118, now seen corresponding path program 1 times [2020-10-19 22:11:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:11:44,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [730164587] [2020-10-19 22:11:44,171 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 22:11:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:44,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-19 22:11:44,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:44,293 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 22:11:44,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:11:44,303 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 22:11:44,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [730164587] [2020-10-19 22:11:44,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:44,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 22:11:44,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747219192] [2020-10-19 22:11:44,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:11:44,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:11:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:11:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:11:44,334 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-10-19 22:11:44,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:44,373 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2020-10-19 22:11:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:11:44,377 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-19 22:11:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:44,387 INFO L225 Difference]: With dead ends: 47 [2020-10-19 22:11:44,388 INFO L226 Difference]: Without dead ends: 21 [2020-10-19 22:11:44,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 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 22:11:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-19 22:11:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-19 22:11:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-19 22:11:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-19 22:11:44,431 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-10-19 22:11:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:44,432 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-19 22:11:44,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:11:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-19 22:11:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:11:44,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:44,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:44,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 22:11:44,646 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:44,646 INFO L82 PathProgramCache]: Analyzing trace with hash 108247460, now seen corresponding path program 1 times [2020-10-19 22:11:44,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:11:44,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783374090] [2020-10-19 22:11:44,649 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 22:11:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:11:44,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:44,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783374090] [2020-10-19 22:11:44,858 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:44,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816185526] [2020-10-19 22:11:44,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:11:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:44,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 22:11:44,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:45,021 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 22:11:45,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 22:11:45,042 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 22:11:45,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:45,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-10-19 22:11:45,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128714070] [2020-10-19 22:11:45,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:11:45,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 22:11:45,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:11:45,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 22:11:45,047 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-10-19 22:11:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:45,228 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2020-10-19 22:11:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 22:11:45,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-19 22:11:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:45,230 INFO L225 Difference]: With dead ends: 48 [2020-10-19 22:11:45,230 INFO L226 Difference]: Without dead ends: 34 [2020-10-19 22:11:45,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:11:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-19 22:11:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-10-19 22:11:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 22:11:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-19 22:11:45,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-10-19 22:11:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:45,241 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-19 22:11:45,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:11:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-19 22:11:45,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:11:45,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:45,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:45,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3 [2020-10-19 22:11:45,646 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1242970242, now seen corresponding path program 1 times [2020-10-19 22:11:45,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 22:11:45,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6291348] [2020-10-19 22:11:45,649 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 22:11:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 22:11:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:45,786 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 10 treesize of output 8 [2020-10-19 22:11:45,787 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:45,796 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:45,797 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:45,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-10-19 22:11:45,819 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-19 22:11:45,819 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:45,827 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:45,827 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:45,828 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2020-10-19 22:11:45,903 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 22 [2020-10-19 22:11:45,905 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:45,918 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6291348] [2020-10-19 22:11:45,920 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:45,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442630732] [2020-10-19 22:11:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 22:11:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:46,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 22:11:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:46,129 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 11 treesize of output 7 [2020-10-19 22:11:46,130 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:46,145 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:46,146 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 22:11:46,147 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-10-19 22:11:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:46,273 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:46,274 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 45 [2020-10-19 22:11:46,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:46,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784291250] [2020-10-19 22:11:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:46,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 22:11:46,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:46,379 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 22:11:46,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:46,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-19 22:11:46,380 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-19 22:11:46,381 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:11:47,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:47,020 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-19 22:11:47,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:11:47 BoogieIcfgContainer [2020-10-19 22:11:47,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:11:47,021 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:11:47,021 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:11:47,021 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:11:47,022 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:44" (3/4) ... [2020-10-19 22:11:47,026 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 22:11:47,026 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:11:47,028 INFO L168 Benchmark]: Toolchain (without parser) took 4101.76 ms. Allocated memory was 34.6 MB in the beginning and 48.8 MB in the end (delta: 14.2 MB). Free memory was 11.5 MB in the beginning and 18.1 MB in the end (delta: -6.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:47,029 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 33.6 MB. Free memory was 18.6 MB in the beginning and 18.5 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. [2020-10-19 22:11:47,030 INFO L168 Benchmark]: CACSL2BoogieTranslator took 503.91 ms. Allocated memory was 34.6 MB in the beginning and 43.5 MB in the end (delta: 8.9 MB). Free memory was 10.6 MB in the beginning and 25.1 MB in the end (delta: -14.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:47,031 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.46 ms. Allocated memory is still 43.5 MB. Free memory was 25.1 MB in the beginning and 23.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:47,031 INFO L168 Benchmark]: Boogie Preprocessor took 41.41 ms. Allocated memory is still 43.5 MB. Free memory was 23.1 MB in the beginning and 21.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:47,032 INFO L168 Benchmark]: RCFGBuilder took 478.61 ms. Allocated memory is still 43.5 MB. Free memory was 21.5 MB in the beginning and 14.3 MB in the end (delta: 7.2 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:47,033 INFO L168 Benchmark]: TraceAbstraction took 3008.68 ms. Allocated memory was 43.5 MB in the beginning and 48.8 MB in the end (delta: 5.2 MB). Free memory was 13.7 MB in the beginning and 18.9 MB in the end (delta: -5.2 MB). Peak memory consumption was 39.8 kB. Max. memory is 14.3 GB. [2020-10-19 22:11:47,034 INFO L168 Benchmark]: Witness Printer took 5.59 ms. Allocated memory is still 48.8 MB. Free memory was 18.9 MB in the beginning and 18.5 MB in the end (delta: 404.4 kB). Peak memory consumption was 404.4 kB. Max. memory is 14.3 GB. [2020-10-19 22:11:47,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 33.6 MB. Free memory was 18.6 MB in the beginning and 18.5 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 503.91 ms. Allocated memory was 34.6 MB in the beginning and 43.5 MB in the end (delta: 8.9 MB). Free memory was 10.6 MB in the beginning and 25.1 MB in the end (delta: -14.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 51.46 ms. Allocated memory is still 43.5 MB. Free memory was 25.1 MB in the beginning and 23.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 41.41 ms. Allocated memory is still 43.5 MB. Free memory was 23.1 MB in the beginning and 21.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 478.61 ms. Allocated memory is still 43.5 MB. Free memory was 21.5 MB in the beginning and 14.3 MB in the end (delta: 7.2 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3008.68 ms. Allocated memory was 43.5 MB in the beginning and 48.8 MB in the end (delta: 5.2 MB). Free memory was 13.7 MB in the beginning and 18.9 MB in the end (delta: -5.2 MB). Peak memory consumption was 39.8 kB. Max. memory is 14.3 GB. * Witness Printer took 5.59 ms. Allocated memory is still 48.8 MB. Free memory was 18.9 MB in the beginning and 18.5 MB in the end (delta: 404.4 kB). Peak memory consumption was 404.4 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: 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: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i