./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/ldv-regression/test25-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.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/ldv-regression/test25-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 .................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:43:55,512 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:43:55,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:43:55,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:43:55,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:43:55,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:43:55,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:43:55,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:43:55,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:43:55,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:43:55,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:43:55,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:43:55,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:43:55,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:43:55,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:43:55,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:43:55,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:43:55,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:43:55,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:43:55,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:43:55,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:43:55,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:43:55,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:43:55,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:43:55,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:43:55,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:43:55,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:43:55,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:43:55,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:43:55,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:43:55,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:43:55,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:43:55,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:43:55,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:43:55,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:43:55,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:43:55,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:43:55,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:43:55,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:43:55,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:43:55,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:43:55,590 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:43:55,635 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:43:55,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:43:55,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:43:55,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:43:55,637 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:43:55,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:43:55,638 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:43:55,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:43:55,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:43:55,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:43:55,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:43:55,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:43:55,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:43:55,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:43:55,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:43:55,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:43:55,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:43:55,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:43:55,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:43:55,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:43:55,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:43:55,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:43:55,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:43:55,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:43:55,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:43:55,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:43:55,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:43:55,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:43:55,642 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:43:55,642 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 -> 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 [2020-10-20 00:43:55,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:43:55,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:43:55,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:43:55,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:43:55,873 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:43:55,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2020-10-20 00:43:55,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77547110c/37d1cf0bfdb9499f86e454a6917565b7/FLAGb5707b322 [2020-10-20 00:43:56,429 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:43:56,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2020-10-20 00:43:56,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77547110c/37d1cf0bfdb9499f86e454a6917565b7/FLAGb5707b322 [2020-10-20 00:43:56,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77547110c/37d1cf0bfdb9499f86e454a6917565b7 [2020-10-20 00:43:56,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:43:56,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:43:56,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:56,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:43:56,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:43:56,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a58770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:56, skipping insertion in model container [2020-10-20 00:43:56,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:43:56" (1/1) ... [2020-10-20 00:43:56,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:43:56,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:43:57,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:57,129 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:43:57,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:43:57,167 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:43:57,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57 WrapperNode [2020-10-20 00:43:57,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:43:57,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:57,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:43:57,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:43:57,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:43:57,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:43:57,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:43:57,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:43:57,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (1/1) ... [2020-10-20 00:43:57,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:43:57,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:43:57,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:43:57,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:43:57,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (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 [2020-10-20 00:43:57,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:43:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:43:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:43:57,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:43:57,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 00:43:57,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:43:57,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:43:57,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:43:57,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:43:57,689 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:43:57,690 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 00:43:57,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:57 BoogieIcfgContainer [2020-10-20 00:43:57,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:43:57,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:43:57,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:43:57,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:43:57,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:43:56" (1/3) ... [2020-10-20 00:43:57,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485d7d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:57, skipping insertion in model container [2020-10-20 00:43:57,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:43:57" (2/3) ... [2020-10-20 00:43:57,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485d7d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:43:57, skipping insertion in model container [2020-10-20 00:43:57,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:43:57" (3/3) ... [2020-10-20 00:43:57,702 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-20 00:43:57,714 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:43:57,723 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:43:57,737 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:43:57,762 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:43:57,762 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:43:57,763 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:43:57,763 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:43:57,763 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:43:57,763 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:43:57,763 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:43:57,763 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:43:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-20 00:43:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:43:57,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:57,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:57,783 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:57,788 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-10-20 00:43:57,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:57,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371012692] [2020-10-20 00:43:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:57,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371012692] [2020-10-20 00:43:57,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:43:57,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:43:57,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164892510] [2020-10-20 00:43:57,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:43:57,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:58,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:43:58,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:43:58,017 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-20 00:43:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:58,037 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-10-20 00:43:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:43:58,039 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:43:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:58,050 INFO L225 Difference]: With dead ends: 31 [2020-10-20 00:43:58,050 INFO L226 Difference]: Without dead ends: 13 [2020-10-20 00:43:58,054 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 [2020-10-20 00:43:58,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-20 00:43:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-20 00:43:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 00:43:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-20 00:43:58,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-20 00:43:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:58,092 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-20 00:43:58,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:43:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-20 00:43:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:43:58,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:58,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:58,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:43:58,094 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:58,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-10-20 00:43:58,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:58,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381924985] [2020-10-20 00:43:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:58,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381924985] [2020-10-20 00:43:58,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:43:58,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:43:58,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698874549] [2020-10-20 00:43:58,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:43:58,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:58,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:43:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:43:58,205 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-20 00:43:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:58,258 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-20 00:43:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:43:58,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 00:43:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:58,261 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:43:58,262 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 00:43:58,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:43:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 00:43:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-20 00:43:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 00:43:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-20 00:43:58,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-10-20 00:43:58,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:58,274 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-20 00:43:58,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:43:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-20 00:43:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:43:58,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:58,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:58,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:43:58,278 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:58,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:58,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2020-10-20 00:43:58,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:58,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262688511] [2020-10-20 00:43:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:58,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262688511] [2020-10-20 00:43:58,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751939524] [2020-10-20 00:43:58,370 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 [2020-10-20 00:43:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:43:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:43:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:58,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:43:58,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:43:58,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099758822] [2020-10-20 00:43:58,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:43:58,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:43:58,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:43:58,582 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-10-20 00:43:58,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:58,624 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-20 00:43:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:43:58,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-20 00:43:58,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:58,626 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:43:58,626 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 00:43:58,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:43:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 00:43:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-20 00:43:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:43:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-20 00:43:58,630 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-20 00:43:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:58,631 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-20 00:43:58,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:43:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-20 00:43:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:43:58,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:58,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:58,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:43:58,833 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2020-10-20 00:43:58,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:58,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624193477] [2020-10-20 00:43:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:43:58,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624193477] [2020-10-20 00:43:58,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196519930] [2020-10-20 00:43:58,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:43:58,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 00:43:58,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:43:59,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 00:43:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:43:59,116 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-10-20 00:43:59,117 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-10-20 00:43:59,119 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:43:59,123 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:43:59,123 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:43:59,124 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-10-20 00:43:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 00:43:59,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 00:43:59,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-10-20 00:43:59,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873023912] [2020-10-20 00:43:59,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:43:59,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:59,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:43:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:43:59,145 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-10-20 00:43:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:59,214 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-10-20 00:43:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:43:59,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-20 00:43:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:59,216 INFO L225 Difference]: With dead ends: 23 [2020-10-20 00:43:59,216 INFO L226 Difference]: Without dead ends: 18 [2020-10-20 00:43:59,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:43:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-20 00:43:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-20 00:43:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 00:43:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-20 00:43:59,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-10-20 00:43:59,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:59,221 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-20 00:43:59,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:43:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-20 00:43:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 00:43:59,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:59,223 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:59,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:43:59,435 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1859304665, now seen corresponding path program 1 times [2020-10-20 00:43:59,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:59,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694686741] [2020-10-20 00:43:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 00:43:59,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694686741] [2020-10-20 00:43:59,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638858299] [2020-10-20 00:43:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:43:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:43:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:43:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 00:43:59,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:43:59,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:43:59,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420615515] [2020-10-20 00:43:59,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:43:59,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:43:59,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:43:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:43:59,620 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-10-20 00:43:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:43:59,649 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-20 00:43:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:43:59,650 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-20 00:43:59,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:43:59,650 INFO L225 Difference]: With dead ends: 32 [2020-10-20 00:43:59,650 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 00:43:59,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:43:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 00:43:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-20 00:43:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 00:43:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-20 00:43:59,655 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-20 00:43:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:43:59,655 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-20 00:43:59,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:43:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-20 00:43:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:43:59,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:43:59,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:43:59,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:43:59,871 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:43:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:43:59,871 INFO L82 PathProgramCache]: Analyzing trace with hash 291228695, now seen corresponding path program 2 times [2020-10-20 00:43:59,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:43:59,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406751320] [2020-10-20 00:43:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:43:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:43:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 00:43:59,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406751320] [2020-10-20 00:43:59,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674544749] [2020-10-20 00:43:59,976 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 [2020-10-20 00:44:00,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:44:00,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:44:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 00:44:00,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:00,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 00:44:00,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118077727] [2020-10-20 00:44:00,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 00:44:00,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:00,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 00:44:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:44:00,098 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2020-10-20 00:44:00,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:00,141 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-20 00:44:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:44:00,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-20 00:44:00,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:00,143 INFO L225 Difference]: With dead ends: 34 [2020-10-20 00:44:00,143 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 00:44:00,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:44:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 00:44:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-20 00:44:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-20 00:44:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-20 00:44:00,148 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-20 00:44:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:00,148 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-20 00:44:00,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 00:44:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-20 00:44:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 00:44:00,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:00,149 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:00,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:00,363 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:00,363 INFO L82 PathProgramCache]: Analyzing trace with hash 903742421, now seen corresponding path program 3 times [2020-10-20 00:44:00,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:00,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105452163] [2020-10-20 00:44:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 00:44:00,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105452163] [2020-10-20 00:44:00,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659147830] [2020-10-20 00:44:00,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:00,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-20 00:44:00,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:00,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 00:44:00,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:00,668 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-10-20 00:44:00,669 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-10-20 00:44:00,671 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:44:00,673 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:44:00,674 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:44:00,674 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-10-20 00:44:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-20 00:44:00,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:00,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-10-20 00:44:00,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057999054] [2020-10-20 00:44:00,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:44:00,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:00,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:44:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:44:00,695 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-10-20 00:44:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:00,836 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-20 00:44:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:44:00,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-20 00:44:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:00,837 INFO L225 Difference]: With dead ends: 38 [2020-10-20 00:44:00,837 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 00:44:00,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:44:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 00:44:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-20 00:44:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:44:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-20 00:44:00,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-10-20 00:44:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:00,844 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-20 00:44:00,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:44:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-20 00:44:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 00:44:00,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:00,846 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:01,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 00:44:01,058 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1251069224, now seen corresponding path program 4 times [2020-10-20 00:44:01,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:01,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328353845] [2020-10-20 00:44:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 00:44:01,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328353845] [2020-10-20 00:44:01,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916330336] [2020-10-20 00:44:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:01,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:44:01,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:01,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 00:44:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:01,345 INFO L350 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-10-20 00:44:01,345 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-10-20 00:44:01,347 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:44:01,349 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:44:01,349 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:44:01,350 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-10-20 00:44:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-20 00:44:01,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:01,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-20 00:44:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628598479] [2020-10-20 00:44:01,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 00:44:01,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:01,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 00:44:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:44:01,372 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2020-10-20 00:44:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:01,583 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-20 00:44:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 00:44:01,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-20 00:44:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:01,584 INFO L225 Difference]: With dead ends: 44 [2020-10-20 00:44:01,584 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 00:44:01,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:44:01,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 00:44:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-20 00:44:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:44:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-20 00:44:01,589 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-10-20 00:44:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:01,590 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-20 00:44:01,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 00:44:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-20 00:44:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-20 00:44:01,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:01,591 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:01,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:01,803 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:01,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1378869733, now seen corresponding path program 5 times [2020-10-20 00:44:01,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:01,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603395270] [2020-10-20 00:44:01,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-20 00:44:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603395270] [2020-10-20 00:44:01,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272097771] [2020-10-20 00:44:01,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:03,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-20 00:44:03,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:44:03,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-20 00:44:03,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:03,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 00:44:03,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739647586] [2020-10-20 00:44:03,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 00:44:03,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 00:44:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:44:03,699 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-10-20 00:44:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:03,746 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-20 00:44:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:44:03,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-20 00:44:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:03,749 INFO L225 Difference]: With dead ends: 48 [2020-10-20 00:44:03,749 INFO L226 Difference]: Without dead ends: 33 [2020-10-20 00:44:03,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:44:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-20 00:44:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-20 00:44:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:44:03,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-20 00:44:03,753 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-10-20 00:44:03,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:03,754 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-20 00:44:03,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 00:44:03,754 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-20 00:44:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 00:44:03,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:03,755 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:03,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:03,965 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1005994073, now seen corresponding path program 6 times [2020-10-20 00:44:03,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:03,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393535408] [2020-10-20 00:44:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-20 00:44:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393535408] [2020-10-20 00:44:04,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615239287] [2020-10-20 00:44:04,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:05,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-20 00:44:05,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:05,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 00:44:05,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:05,961 INFO L350 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2020-10-20 00:44:05,961 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 12 [2020-10-20 00:44:05,963 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:44:05,965 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:44:05,965 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 00:44:05,965 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:5 [2020-10-20 00:44:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-20 00:44:05,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:05,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-10-20 00:44:05,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128800913] [2020-10-20 00:44:05,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:44:05,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:44:05,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:44:05,996 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2020-10-20 00:44:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:06,324 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-20 00:44:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-20 00:44:06,325 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-20 00:44:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:06,326 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:44:06,326 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 00:44:06,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:44:06,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 00:44:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-20 00:44:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 00:44:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-20 00:44:06,332 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-10-20 00:44:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:06,332 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-20 00:44:06,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:44:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-20 00:44:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 00:44:06,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:06,334 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:06,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 00:44:06,538 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1595148508, now seen corresponding path program 7 times [2020-10-20 00:44:06,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:06,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839102459] [2020-10-20 00:44:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-20 00:44:06,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839102459] [2020-10-20 00:44:06,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516214939] [2020-10-20 00:44:06,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:06,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:06,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 00:44:06,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-20 00:44:06,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:06,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 00:44:06,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742079779] [2020-10-20 00:44:06,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:44:06,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:06,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:44:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:44:06,807 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-10-20 00:44:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:06,867 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-20 00:44:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 00:44:06,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-20 00:44:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:06,870 INFO L225 Difference]: With dead ends: 56 [2020-10-20 00:44:06,870 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 00:44:06,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:44:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 00:44:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-20 00:44:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 00:44:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-20 00:44:06,876 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-10-20 00:44:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:06,877 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-20 00:44:06,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:44:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-20 00:44:06,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 00:44:06,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:06,879 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:07,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:07,091 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1671756646, now seen corresponding path program 8 times [2020-10-20 00:44:07,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:07,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905799720] [2020-10-20 00:44:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-20 00:44:07,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905799720] [2020-10-20 00:44:07,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520896678] [2020-10-20 00:44:07,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:07,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:44:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 00:44:07,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-20 00:44:07,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:07,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-20 00:44:07,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881456277] [2020-10-20 00:44:07,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 00:44:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:44:07,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 00:44:07,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:44:07,344 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 13 states. [2020-10-20 00:44:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:07,419 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-20 00:44:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:44:07,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-20 00:44:07,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:07,424 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:44:07,424 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 00:44:07,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:44:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 00:44:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-20 00:44:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-20 00:44:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-20 00:44:07,429 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-10-20 00:44:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:07,429 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-20 00:44:07,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 00:44:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-20 00:44:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-20 00:44:07,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:07,431 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:07,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:44:07,645 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:07,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:07,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1546516264, now seen corresponding path program 9 times [2020-10-20 00:44:07,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:44:07,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100746464] [2020-10-20 00:44:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:44:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:08,240 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 23: A-local: [(|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,241 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 24: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,241 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 25: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,242 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 26: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,259 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 27: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,259 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 28: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,260 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 29: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,260 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 30: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,261 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 31: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,261 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 32: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,261 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 33: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,262 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 34: A-local: [(|ULTIMATE.start_main_~#array~0.offset_1| Int), (ULTIMATE.start_main_~i~0_1 Int), (|#memory_$Pointer$.offset_20| (Array Int (Array Int Int)))], B-local: []. [2020-10-20 00:44:08,263 ERROR L253 erpolLogProxyWrapper]: Interpolant 35 not inductive [2020-10-20 00:44:08,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 00:44:08,270 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) [2020-10-20 00:44:08,277 INFO L168 Benchmark]: Toolchain (without parser) took 11441.50 ms. Allocated memory was 37.2 MB in the beginning and 76.5 MB in the end (delta: 39.3 MB). Free memory was 12.9 MB in the beginning and 54.4 MB in the end (delta: -41.5 MB). Peak memory consumption was 46.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:08,281 INFO L168 Benchmark]: CDTParser took 0.65 ms. Allocated memory is still 36.7 MB. Free memory is still 16.0 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:44:08,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.59 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 11.9 MB in the beginning and 27.4 MB in the end (delta: -15.5 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:08,284 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.83 ms. Allocated memory is still 45.1 MB. Free memory was 27.4 MB in the beginning and 25.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:08,285 INFO L168 Benchmark]: Boogie Preprocessor took 32.16 ms. Allocated memory is still 45.1 MB. Free memory was 25.4 MB in the beginning and 23.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:08,286 INFO L168 Benchmark]: RCFGBuilder took 443.07 ms. Allocated memory was 45.1 MB in the beginning and 49.3 MB in the end (delta: 4.2 MB). Free memory was 23.9 MB in the beginning and 24.2 MB in the end (delta: -316.8 kB). Peak memory consumption was 13.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:08,289 INFO L168 Benchmark]: TraceAbstraction took 10581.22 ms. Allocated memory was 49.3 MB in the beginning and 76.5 MB in the end (delta: 27.3 MB). Free memory was 23.6 MB in the beginning and 54.4 MB in the end (delta: -30.8 MB). Peak memory consumption was 44.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:08,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.65 ms. Allocated memory is still 36.7 MB. Free memory is still 16.0 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 326.59 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 11.9 MB in the beginning and 27.4 MB in the end (delta: -15.5 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 47.83 ms. Allocated memory is still 45.1 MB. Free memory was 27.4 MB in the beginning and 25.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 32.16 ms. Allocated memory is still 45.1 MB. Free memory was 25.4 MB in the beginning and 23.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 443.07 ms. Allocated memory was 45.1 MB in the beginning and 49.3 MB in the end (delta: 4.2 MB). Free memory was 23.9 MB in the beginning and 24.2 MB in the end (delta: -316.8 kB). Peak memory consumption was 13.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 10581.22 ms. Allocated memory was 49.3 MB in the beginning and 76.5 MB in the end (delta: 27.3 MB). Free memory was 23.6 MB in the beginning and 54.4 MB in the end (delta: -30.8 MB). Peak memory consumption was 44.9 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 [2020-10-20 00:44:10,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:44:10,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:44:10,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:44:10,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:44:10,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:44:10,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:44:10,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:44:10,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:44:10,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:44:10,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:44:10,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:44:10,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:44:10,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:44:10,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:44:10,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:44:10,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:44:10,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:44:10,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:44:10,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:44:10,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:44:10,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:44:10,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:44:10,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:44:10,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:44:10,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:44:10,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:44:10,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:44:10,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:44:10,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:44:10,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:44:10,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:44:10,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:44:10,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:44:10,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:44:10,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:44:10,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:44:10,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:44:10,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:44:10,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:44:10,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:44:10,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:44:10,487 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:44:10,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:44:10,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:44:10,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:44:10,489 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:44:10,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:44:10,489 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:44:10,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:44:10,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:44:10,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:44:10,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:44:10,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:44:10,490 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:44:10,490 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:44:10,491 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:44:10,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:44:10,491 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:44:10,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:44:10,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:44:10,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:44:10,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:44:10,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:44:10,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:44:10,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:44:10,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:44:10,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:44:10,493 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:44:10,493 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:44:10,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:44:10,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:44:10,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:44:10,494 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 -> 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 [2020-10-20 00:44:10,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:44:10,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:44:10,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:44:10,713 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:44:10,713 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:44:10,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2020-10-20 00:44:10,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60df20ee/e06b5d00cc624cd196b8303bd16f38a1/FLAGd3e9a4469 [2020-10-20 00:44:11,337 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:44:11,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2020-10-20 00:44:11,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60df20ee/e06b5d00cc624cd196b8303bd16f38a1/FLAGd3e9a4469 [2020-10-20 00:44:11,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f60df20ee/e06b5d00cc624cd196b8303bd16f38a1 [2020-10-20 00:44:11,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:44:11,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:44:11,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:44:11,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:44:11,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:44:11,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:44:11" (1/1) ... [2020-10-20 00:44:11,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652a1a1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:11, skipping insertion in model container [2020-10-20 00:44:11,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:44:11" (1/1) ... [2020-10-20 00:44:11,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:44:11,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:44:12,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:44:12,069 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:44:12,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:44:12,113 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:44:12,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12 WrapperNode [2020-10-20 00:44:12,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:44:12,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:44:12,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:44:12,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:44:12,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:44:12,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:44:12,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:44:12,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:44:12,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (1/1) ... [2020-10-20 00:44:12,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:44:12,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:44:12,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:44:12,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:44:12,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (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 [2020-10-20 00:44:12,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 00:44:12,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:44:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 00:44:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:44:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:44:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:44:12,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:44:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:44:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-20 00:44:12,605 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:44:12,606 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-20 00:44:12,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:12 BoogieIcfgContainer [2020-10-20 00:44:12,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:44:12,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:44:12,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:44:12,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:44:12,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:44:11" (1/3) ... [2020-10-20 00:44:12,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dd6918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:44:12, skipping insertion in model container [2020-10-20 00:44:12,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:44:12" (2/3) ... [2020-10-20 00:44:12,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dd6918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:44:12, skipping insertion in model container [2020-10-20 00:44:12,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:12" (3/3) ... [2020-10-20 00:44:12,619 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-10-20 00:44:12,634 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:44:12,644 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:44:12,678 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:44:12,708 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:44:12,708 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:44:12,708 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:44:12,708 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:44:12,709 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:44:12,718 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:44:12,719 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:44:12,719 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:44:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-20 00:44:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:44:12,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:12,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:12,749 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:12,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:12,754 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-10-20 00:44:12,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:44:12,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808618083] [2020-10-20 00:44:12,767 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 [2020-10-20 00:44:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:12,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:44:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:12,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:44:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:12,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808618083] [2020-10-20 00:44:12,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:44:12,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:44:12,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997753615] [2020-10-20 00:44:12,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:44:12,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:44:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:44:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:44:12,934 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-10-20 00:44:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:12,952 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2020-10-20 00:44:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:44:12,954 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:44:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:12,961 INFO L225 Difference]: With dead ends: 31 [2020-10-20 00:44:12,962 INFO L226 Difference]: Without dead ends: 13 [2020-10-20 00:44:12,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:44:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-20 00:44:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-20 00:44:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 00:44:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-20 00:44:12,994 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-20 00:44:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:12,994 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-20 00:44:12,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:44:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-20 00:44:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:44:12,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:12,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:13,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:44:13,209 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:13,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-10-20 00:44:13,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:44:13,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252990803] [2020-10-20 00:44:13,211 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 [2020-10-20 00:44:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 00:44:13,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:13,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:44:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:13,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252990803] [2020-10-20 00:44:13,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:44:13,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:44:13,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606908266] [2020-10-20 00:44:13,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:44:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:44:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:44:13,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:44:13,327 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-10-20 00:44:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:13,415 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-20 00:44:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:44:13,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:44:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:13,417 INFO L225 Difference]: With dead ends: 25 [2020-10-20 00:44:13,418 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 00:44:13,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:44:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 00:44:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-20 00:44:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:44:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-20 00:44:13,424 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2020-10-20 00:44:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:13,424 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-20 00:44:13,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:44:13,424 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-20 00:44:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 00:44:13,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:13,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:13,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:44:13,647 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 1 times [2020-10-20 00:44:13,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:44:13,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480947633] [2020-10-20 00:44:13,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-20 00:44:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:44:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:44:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:13,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:44:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:44:13,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480947633] [2020-10-20 00:44:13,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:44:13,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-20 00:44:13,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628911608] [2020-10-20 00:44:13,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:44:13,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:44:13,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:44:13,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:44:13,831 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 8 states. [2020-10-20 00:44:14,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:44:14,184 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-20 00:44:14,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:44:14,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-20 00:44:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:44:14,186 INFO L225 Difference]: With dead ends: 33 [2020-10-20 00:44:14,186 INFO L226 Difference]: Without dead ends: 24 [2020-10-20 00:44:14,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:44:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-20 00:44:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 00:44:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 00:44:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-20 00:44:14,193 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-10-20 00:44:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:44:14,193 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-20 00:44:14,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:44:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-20 00:44:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 00:44:14,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:44:14,195 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:44:14,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:44:14,410 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:44:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:44:14,411 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 2 times [2020-10-20 00:44:14,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:44:14,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591285498] [2020-10-20 00:44:14,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-20 00:44:14,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 00:44:14,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:14,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 00:44:14,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:14,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591285498] [2020-10-20 00:44:14,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:44:14,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [835191242] [2020-10-20 00:44:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-20 00:44:14,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 00:44:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 00:44:14,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:14,859 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:44:14,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396169660] [2020-10-20 00:44:14,860 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 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 [2020-10-20 00:44:15,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-20 00:44:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:44:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 00:44:15,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:44:15,160 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 24 treesize of output 12 [2020-10-20 00:44:15,162 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 00:44:15,187 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 00:44:15,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 00:44:15,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:44:15,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 00:44:15,189 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 00:44:15,190 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:44:15,805 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 [2020-10-20 00:44:15,825 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 00:44:15,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:44:15 BoogieIcfgContainer [2020-10-20 00:44:15,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:44:15,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:44:15,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:44:15,826 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:44:15,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:44:12" (3/4) ... [2020-10-20 00:44:15,830 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:44:15,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:44:15,833 INFO L168 Benchmark]: Toolchain (without parser) took 4048.98 ms. Allocated memory was 39.8 MB in the beginning and 48.2 MB in the end (delta: 8.4 MB). Free memory was 17.6 MB in the beginning and 13.7 MB in the end (delta: 3.9 MB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:15,833 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 30.4 MB. Free memory was 6.6 MB in the beginning and 6.6 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:44:15,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.87 ms. Allocated memory was 39.8 MB in the beginning and 40.4 MB in the end (delta: 524.3 kB). Free memory was 16.7 MB in the beginning and 16.9 MB in the end (delta: -232.6 kB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:15,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.41 ms. Allocated memory is still 40.4 MB. Free memory was 16.9 MB in the beginning and 15.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:15,836 INFO L168 Benchmark]: Boogie Preprocessor took 34.70 ms. Allocated memory is still 40.4 MB. Free memory was 15.0 MB in the beginning and 13.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:15,837 INFO L168 Benchmark]: RCFGBuilder took 414.37 ms. Allocated memory was 40.4 MB in the beginning and 41.9 MB in the end (delta: 1.6 MB). Free memory was 13.3 MB in the beginning and 11.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:15,838 INFO L168 Benchmark]: TraceAbstraction took 3214.28 ms. Allocated memory was 41.9 MB in the beginning and 48.2 MB in the end (delta: 6.3 MB). Free memory was 11.2 MB in the beginning and 14.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:44:15,839 INFO L168 Benchmark]: Witness Printer took 4.99 ms. Allocated memory is still 48.2 MB. Free memory was 14.1 MB in the beginning and 13.7 MB in the end (delta: 426.9 kB). Peak memory consumption was 426.9 kB. Max. memory is 14.3 GB. [2020-10-20 00:44:15,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 30.4 MB. Free memory was 6.6 MB in the beginning and 6.6 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 323.87 ms. Allocated memory was 39.8 MB in the beginning and 40.4 MB in the end (delta: 524.3 kB). Free memory was 16.7 MB in the beginning and 16.9 MB in the end (delta: -232.6 kB). Peak memory consumption was 7.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 45.41 ms. Allocated memory is still 40.4 MB. Free memory was 16.9 MB in the beginning and 15.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 34.70 ms. Allocated memory is still 40.4 MB. Free memory was 15.0 MB in the beginning and 13.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * RCFGBuilder took 414.37 ms. Allocated memory was 40.4 MB in the beginning and 41.9 MB in the end (delta: 1.6 MB). Free memory was 13.3 MB in the beginning and 11.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3214.28 ms. Allocated memory was 41.9 MB in the beginning and 48.2 MB in the end (delta: 6.3 MB). Free memory was 11.2 MB in the beginning and 14.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. * Witness Printer took 4.99 ms. Allocated memory is still 48.2 MB. Free memory was 14.1 MB in the beginning and 13.7 MB in the end (delta: 426.9 kB). Peak memory consumption was 426.9 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND FALSE !(j < 10) [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) [L36] COND FALSE !(i < *pa) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] COND TRUE !check(&cont, i) [L3] __assert_fail("0", "test25-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 3.1s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 9 SDslu, 40 SDs, 0 SdLazy, 35 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 1242 SizeOfPredicates, 2 NumberOfNonLiveVariables, 187 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...