./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn1.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 3df2e40dd5334d958c7fe1aacbe2314394082184 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn1.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 3df2e40dd5334d958c7fe1aacbe2314394082184 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 19:04:36,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 19:04:36,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 19:04:36,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 19:04:36,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 19:04:36,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 19:04:36,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 19:04:36,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 19:04:36,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 19:04:36,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 19:04:36,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 19:04:36,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 19:04:36,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 19:04:36,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 19:04:36,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 19:04:36,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 19:04:36,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 19:04:36,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 19:04:36,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 19:04:36,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 19:04:36,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 19:04:36,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 19:04:36,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 19:04:36,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 19:04:36,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 19:04:36,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 19:04:36,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 19:04:36,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 19:04:36,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 19:04:36,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 19:04:36,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 19:04:36,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 19:04:36,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 19:04:36,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 19:04:36,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 19:04:36,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 19:04:36,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 19:04:36,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 19:04:36,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 19:04:36,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 19:04:36,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 19:04:36,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 19:04:36,703 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 19:04:36,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 19:04:36,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 19:04:36,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 19:04:36,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 19:04:36,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 19:04:36,706 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 19:04:36,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 19:04:36,706 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 19:04:36,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 19:04:36,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 19:04:36,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 19:04:36,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 19:04:36,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 19:04:36,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 19:04:36,708 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 19:04:36,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 19:04:36,708 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 19:04:36,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 19:04:36,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 19:04:36,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 19:04:36,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 19:04:36,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:04:36,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 19:04:36,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 19:04:36,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 19:04:36,709 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 19:04:36,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 19:04:36,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 19:04:36,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 19:04:36,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3df2e40dd5334d958c7fe1aacbe2314394082184 [2021-08-25 19:04:37,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:04:37,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:04:37,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:04:37,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:04:37,022 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:04:37,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn1.c [2021-08-25 19:04:37,059 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a0526db/f7969ad7828d48a398075b5596e19a88/FLAG463957b37 [2021-08-25 19:04:37,401 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:04:37,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c [2021-08-25 19:04:37,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a0526db/f7969ad7828d48a398075b5596e19a88/FLAG463957b37 [2021-08-25 19:04:37,415 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a0526db/f7969ad7828d48a398075b5596e19a88 [2021-08-25 19:04:37,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:04:37,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:04:37,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:04:37,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:04:37,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:04:37,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e79f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37, skipping insertion in model container [2021-08-25 19:04:37,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:04:37,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:04:37,529 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c[587,600] [2021-08-25 19:04:37,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:04:37,574 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:04:37,585 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c[587,600] [2021-08-25 19:04:37,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:04:37,630 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:04:37,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37 WrapperNode [2021-08-25 19:04:37,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:04:37,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:04:37,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:04:37,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:04:37,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:04:37,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:04:37,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:04:37,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:04:37,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:04:37,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:04:37,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:04:37,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:04:37,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (1/1) ... [2021-08-25 19:04:37,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:04:37,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:37,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 19:04:37,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 19:04:37,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 19:04:37,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:04:37,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 19:04:37,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:04:37,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:04:37,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:04:37,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 19:04:38,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:04:38,065 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:04:38,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:04:38 BoogieIcfgContainer [2021-08-25 19:04:38,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:04:38,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:04:38,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:04:38,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:04:38,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:04:37" (1/3) ... [2021-08-25 19:04:38,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b68bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:04:38, skipping insertion in model container [2021-08-25 19:04:38,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:37" (2/3) ... [2021-08-25 19:04:38,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b68bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:04:38, skipping insertion in model container [2021-08-25 19:04:38,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:04:38" (3/3) ... [2021-08-25 19:04:38,073 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn1.c [2021-08-25 19:04:38,077 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:04:38,077 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:04:38,111 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:04:38,116 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 19:04:38,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:04:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:04:38,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:38,131 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:38,132 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:38,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:04:38,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:38,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102486344] [2021-08-25 19:04:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:38,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:04:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:38,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:38,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102486344] [2021-08-25 19:04:38,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102486344] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:04:38,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:04:38,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 19:04:38,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752493900] [2021-08-25 19:04:38,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:04:38,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:04:38,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:04:38,285 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:38,295 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:04:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:04:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:04:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:38,301 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:04:38,301 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:04:38,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:04:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:04:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:04:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:04:38,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:04:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:38,324 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:04:38,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:04:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:04:38,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:38,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:38,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 19:04:38,326 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:38,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:04:38,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:38,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022572810] [2021-08-25 19:04:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:38,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:38,357 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:38,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435850354] [2021-08-25 19:04:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:38,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:38,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:38,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:38,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 19:04:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:04:38,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:04:38,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:38,533 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-08-25 19:04:38,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-08-25 19:04:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:38,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:38,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022572810] [2021-08-25 19:04:38,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:38,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435850354] [2021-08-25 19:04:38,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435850354] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:04:38,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:04:38,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:04:38,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585853797] [2021-08-25 19:04:38,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:04:38,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:04:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:04:38,766 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:38,839 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-08-25 19:04:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:04:38,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:04:38,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:38,840 INFO L225 Difference]: With dead ends: 34 [2021-08-25 19:04:38,840 INFO L226 Difference]: Without dead ends: 32 [2021-08-25 19:04:38,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:04:38,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-25 19:04:38,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-08-25 19:04:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:04:38,844 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:04:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:38,845 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:04:38,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:04:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:04:38,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:38,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:38,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:39,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:39,061 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:39,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:39,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:04:39,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:39,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267948684] [2021-08-25 19:04:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:39,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:39,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:39,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904329765] [2021-08-25 19:04:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:39,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:39,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:39,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 19:04:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:04:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:04:39,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:39,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:39,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267948684] [2021-08-25 19:04:39,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:39,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904329765] [2021-08-25 19:04:39,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904329765] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:04:39,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:04:39,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-25 19:04:39,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896201147] [2021-08-25 19:04:39,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:04:39,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:04:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:04:39,311 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:39,389 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-08-25 19:04:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 19:04:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:04:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:39,390 INFO L225 Difference]: With dead ends: 49 [2021-08-25 19:04:39,391 INFO L226 Difference]: Without dead ends: 40 [2021-08-25 19:04:39,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:04:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-25 19:04:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-08-25 19:04:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:04:39,394 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:04:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:39,394 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:04:39,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:04:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:04:39,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:39,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:39,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:39,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-25 19:04:39,608 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:04:39,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:39,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982548200] [2021-08-25 19:04:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:39,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:39,622 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:39,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634922520] [2021-08-25 19:04:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:39,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:39,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:39,623 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:39,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 19:04:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:04:39,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 19:04:39,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:39,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:39,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982548200] [2021-08-25 19:04:39,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:39,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634922520] [2021-08-25 19:04:39,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634922520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:04:39,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:04:39,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 19:04:39,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775568595] [2021-08-25 19:04:39,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 19:04:39,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:39,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 19:04:39,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 19:04:39,824 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:39,902 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-08-25 19:04:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 19:04:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:04:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:39,903 INFO L225 Difference]: With dead ends: 44 [2021-08-25 19:04:39,904 INFO L226 Difference]: Without dead ends: 37 [2021-08-25 19:04:39,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:04:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-25 19:04:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-08-25 19:04:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-25 19:04:39,907 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-08-25 19:04:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:39,907 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-25 19:04:39,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-25 19:04:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:04:39,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:39,908 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:39,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:40,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:40,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:04:40,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:40,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245877011] [2021-08-25 19:04:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:40,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:40,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:40,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683212215] [2021-08-25 19:04:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:40,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:40,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:40,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:40,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 19:04:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:04:40,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 19:04:40,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:40,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:40,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245877011] [2021-08-25 19:04:40,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:40,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683212215] [2021-08-25 19:04:40,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683212215] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 19:04:40,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:04:40,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-25 19:04:40,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518540638] [2021-08-25 19:04:40,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 19:04:40,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:40,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 19:04:40,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-25 19:04:40,295 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:40,358 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-08-25 19:04:40,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:04:40,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:04:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:40,359 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:04:40,360 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:04:40,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:04:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:04:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-08-25 19:04:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-25 19:04:40,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-08-25 19:04:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:40,362 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-25 19:04:40,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-25 19:04:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:04:40,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:40,363 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:40,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:40,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:40,573 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:04:40,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:40,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270673386] [2021-08-25 19:04:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:40,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:40,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:40,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780452483] [2021-08-25 19:04:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:40,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:40,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:40,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:40,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 19:04:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:04:40,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 19:04:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:40,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-25 19:04:40,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:04:40,780 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-08-25 19:04:40,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-08-25 19:04:40,920 INFO L354 Elim1Store]: treesize reduction 124, result has 16.2 percent of original size [2021-08-25 19:04:40,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 50 [2021-08-25 19:04:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:41,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:41,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270673386] [2021-08-25 19:04:41,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:41,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780452483] [2021-08-25 19:04:41,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780452483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:04:41,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:04:41,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:04:41,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073361773] [2021-08-25 19:04:41,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:04:41,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:41,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:04:41,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:04:41,110 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:41,341 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-08-25 19:04:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 19:04:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:04:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:41,343 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:04:41,343 INFO L226 Difference]: Without dead ends: 41 [2021-08-25 19:04:41,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:04:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-25 19:04:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-08-25 19:04:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-25 19:04:41,347 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2021-08-25 19:04:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:41,348 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-25 19:04:41,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:41,348 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-25 19:04:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:04:41,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:41,349 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:41,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:41,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:41,561 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2021-08-25 19:04:41,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:41,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477628595] [2021-08-25 19:04:41,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:41,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:41,576 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:41,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169727269] [2021-08-25 19:04:41,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:04:41,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:41,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:41,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 19:04:41,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:04:41,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:04:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:04:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:41,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:41,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477628595] [2021-08-25 19:04:41,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:41,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169727269] [2021-08-25 19:04:41,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169727269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:04:41,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:04:41,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:04:41,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15415067] [2021-08-25 19:04:41,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:04:41,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:04:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:04:41,753 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:41,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:41,841 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-08-25 19:04:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 19:04:41,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 19:04:41,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:41,845 INFO L225 Difference]: With dead ends: 65 [2021-08-25 19:04:41,845 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:04:41,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:04:41,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:04:41,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 32. [2021-08-25 19:04:41,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-08-25 19:04:41,861 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-08-25 19:04:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:41,861 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-08-25 19:04:41,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-08-25 19:04:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 19:04:41,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:41,863 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:41,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:42,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:42,077 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2021-08-25 19:04:42,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:42,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461649088] [2021-08-25 19:04:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:42,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:42,109 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:42,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485180149] [2021-08-25 19:04:42,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 19:04:42,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:42,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:42,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:42,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 19:04:42,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 19:04:42,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:04:42,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 19:04:42,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:42,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:42,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461649088] [2021-08-25 19:04:42,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:42,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485180149] [2021-08-25 19:04:42,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485180149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:04:42,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:04:42,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 19:04:42,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551522006] [2021-08-25 19:04:42,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 19:04:42,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 19:04:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 19:04:42,303 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:42,391 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-25 19:04:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:04:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-25 19:04:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:42,393 INFO L225 Difference]: With dead ends: 60 [2021-08-25 19:04:42,393 INFO L226 Difference]: Without dead ends: 53 [2021-08-25 19:04:42,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:04:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-25 19:04:42,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2021-08-25 19:04:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-08-25 19:04:42,396 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2021-08-25 19:04:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:42,396 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-08-25 19:04:42,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-08-25 19:04:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:04:42,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:42,397 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:42,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:42,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:42,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:42,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2021-08-25 19:04:42,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:42,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587206295] [2021-08-25 19:04:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:42,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:42,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:42,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634644719] [2021-08-25 19:04:42,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 19:04:42,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:42,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:42,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:42,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 19:04:42,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 19:04:42,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:04:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-25 19:04:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:42,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-25 19:04:42,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-08-25 19:04:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:42,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,922 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-25 19:04:42,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-08-25 19:04:42,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:42,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:42,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 63 [2021-08-25 19:04:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,030 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:04:43,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 52 [2021-08-25 19:04:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,043 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:04:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 111 treesize of output 50 [2021-08-25 19:04:43,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,141 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:04:43,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-08-25 19:04:43,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,319 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-08-25 19:04:43,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 254 treesize of output 506 [2021-08-25 19:04:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 211 [2021-08-25 19:04:43,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 141 [2021-08-25 19:04:43,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,538 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-08-25 19:04:43,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 251 treesize of output 142 [2021-08-25 19:04:43,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:43,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:43,664 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-08-25 19:04:43,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 73 treesize of output 66 [2021-08-25 19:04:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:43,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:43,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587206295] [2021-08-25 19:04:43,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:43,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634644719] [2021-08-25 19:04:43,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634644719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:04:43,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:04:43,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 19:04:43,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267157523] [2021-08-25 19:04:43,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:04:43,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:04:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:04:43,835 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:44,263 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-08-25 19:04:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-25 19:04:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:04:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:44,264 INFO L225 Difference]: With dead ends: 64 [2021-08-25 19:04:44,264 INFO L226 Difference]: Without dead ends: 62 [2021-08-25 19:04:44,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 362.5ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-08-25 19:04:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-25 19:04:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2021-08-25 19:04:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-08-25 19:04:44,268 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 20 [2021-08-25 19:04:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:44,269 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-08-25 19:04:44,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-08-25 19:04:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:04:44,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:44,270 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:44,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:44,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-25 19:04:44,481 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:44,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:44,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 5 times [2021-08-25 19:04:44,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:44,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173796752] [2021-08-25 19:04:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:44,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:44,501 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:44,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292804549] [2021-08-25 19:04:44,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 19:04:44,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:44,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:44,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:44,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 19:04:51,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-25 19:04:51,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:04:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:04:51,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:52,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:52,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173796752] [2021-08-25 19:04:52,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:52,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292804549] [2021-08-25 19:04:52,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292804549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:04:52,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:04:52,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:04:52,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269110918] [2021-08-25 19:04:52,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:04:52,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:04:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:04:52,063 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:52,185 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-08-25 19:04:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 19:04:52,186 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-25 19:04:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:52,187 INFO L225 Difference]: With dead ends: 97 [2021-08-25 19:04:52,187 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 19:04:52,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-25 19:04:52,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 19:04:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 47. [2021-08-25 19:04:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-08-25 19:04:52,199 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 22 [2021-08-25 19:04:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:52,200 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-08-25 19:04:52,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:52,201 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-08-25 19:04:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 19:04:52,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:52,202 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:52,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:52,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-25 19:04:52,403 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:52,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1598333292, now seen corresponding path program 6 times [2021-08-25 19:04:52,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:52,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484241624] [2021-08-25 19:04:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:52,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:52,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:52,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147170992] [2021-08-25 19:04:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 19:04:52,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:52,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:52,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 19:04:52,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-25 19:04:52,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:04:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:04:52,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:04:52,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:52,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484241624] [2021-08-25 19:04:52,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:52,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147170992] [2021-08-25 19:04:52,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147170992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:04:52,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:04:52,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 19:04:52,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218351859] [2021-08-25 19:04:52,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 19:04:52,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:52,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 19:04:52,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 19:04:52,707 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:52,875 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-08-25 19:04:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-25 19:04:52,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-25 19:04:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:52,876 INFO L225 Difference]: With dead ends: 81 [2021-08-25 19:04:52,876 INFO L226 Difference]: Without dead ends: 74 [2021-08-25 19:04:52,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:04:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-25 19:04:52,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2021-08-25 19:04:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-08-25 19:04:52,889 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 22 [2021-08-25 19:04:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:52,889 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-08-25 19:04:52,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-08-25 19:04:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:04:52,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:52,890 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:52,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:53,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-25 19:04:53,097 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 1 times [2021-08-25 19:04:53,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:53,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858514819] [2021-08-25 19:04:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:53,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:53,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:53,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647575890] [2021-08-25 19:04:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:53,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:53,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:53,121 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:53,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-25 19:04:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:04:53,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 19:04:53,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 19:04:53,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:53,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858514819] [2021-08-25 19:04:53,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:53,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647575890] [2021-08-25 19:04:53,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647575890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 19:04:53,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 19:04:53,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 19:04:53,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064489380] [2021-08-25 19:04:53,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:04:53,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 19:04:53,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:04:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:04:53,379 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:04:53,456 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-08-25 19:04:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:04:53,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 19:04:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:04:53,457 INFO L225 Difference]: With dead ends: 76 [2021-08-25 19:04:53,457 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 19:04:53,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-25 19:04:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 19:04:53,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2021-08-25 19:04:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:53,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-25 19:04:53,462 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 24 [2021-08-25 19:04:53,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:04:53,462 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-25 19:04:53,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:04:53,462 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-25 19:04:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 19:04:53,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:04:53,466 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:04:53,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:53,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-25 19:04:53,681 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:04:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:04:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 7 times [2021-08-25 19:04:53,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 19:04:53,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380581404] [2021-08-25 19:04:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:04:53,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 19:04:53,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 19:04:53,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251179225] [2021-08-25 19:04:53,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 19:04:53,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:04:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:04:53,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:04:53,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-25 19:04:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:04:54,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-25 19:04:54,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:04:54,117 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-08-25 19:04:54,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-08-25 19:04:54,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-25 19:04:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,186 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-08-25 19:04:54,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-08-25 19:04:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 60 [2021-08-25 19:04:54,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:04:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:54,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 63 [2021-08-25 19:04:54,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,288 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:04:54,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 142 treesize of output 71 [2021-08-25 19:04:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,385 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-25 19:04:54,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-08-25 19:04:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,874 INFO L354 Elim1Store]: treesize reduction 1177, result has 19.5 percent of original size [2021-08-25 19:04:54,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 39 case distinctions, treesize of input 220 treesize of output 418 [2021-08-25 19:04:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 80 [2021-08-25 19:04:54,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,008 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-25 19:04:55,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 80 [2021-08-25 19:04:55,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,185 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-25 19:04:55,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 76 [2021-08-25 19:04:55,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,265 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-25 19:04:55,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 80 [2021-08-25 19:04:55,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 194 [2021-08-25 19:04:55,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:04:55,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:04:55,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 194 [2021-08-25 19:04:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 133 [2021-08-25 19:04:55,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:04:55,781 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-08-25 19:04:55,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 314 treesize of output 203 [2021-08-25 19:04:56,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:04:56,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-08-25 19:04:57,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 19:04:57,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380581404] [2021-08-25 19:04:57,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:04:57,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251179225] [2021-08-25 19:04:57,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-25 19:04:57,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:04:57,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:04:57,192 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-08-25 19:04:57,192 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:04:57,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:04:57,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-25 19:04:57,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-25 19:04:57,408 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:04:57,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:04:57 BoogieIcfgContainer [2021-08-25 19:04:57,417 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:04:57,418 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:04:57,418 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:04:57,418 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:04:57,418 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:04:38" (3/4) ... [2021-08-25 19:04:57,420 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:04:57,420 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:04:57,424 INFO L168 Benchmark]: Toolchain (without parser) took 20002.87 ms. Allocated memory was 56.6 MB in the beginning and 146.8 MB in the end (delta: 90.2 MB). Free memory was 39.4 MB in the beginning and 109.4 MB in the end (delta: -70.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-08-25 19:04:57,425 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 44.0 MB. Free memory was 26.0 MB in the beginning and 26.0 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:04:57,425 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.19 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 40.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2021-08-25 19:04:57,425 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.56 ms. Allocated memory is still 56.6 MB. Free memory was 40.1 MB in the beginning and 38.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:04:57,425 INFO L168 Benchmark]: Boogie Preprocessor took 37.43 ms. Allocated memory is still 56.6 MB. Free memory was 38.4 MB in the beginning and 37.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:04:57,425 INFO L168 Benchmark]: RCFGBuilder took 342.42 ms. Allocated memory is still 56.6 MB. Free memory was 37.2 MB in the beginning and 35.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-08-25 19:04:57,426 INFO L168 Benchmark]: TraceAbstraction took 19348.83 ms. Allocated memory was 56.6 MB in the beginning and 146.8 MB in the end (delta: 90.2 MB). Free memory was 34.9 MB in the beginning and 109.4 MB in the end (delta: -74.6 MB). Peak memory consumption was 84.3 MB. Max. memory is 16.1 GB. [2021-08-25 19:04:57,426 INFO L168 Benchmark]: Witness Printer took 2.85 ms. Allocated memory is still 146.8 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:04:57,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 44.0 MB. Free memory was 26.0 MB in the beginning and 26.0 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 220.19 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 40.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.56 ms. Allocated memory is still 56.6 MB. Free memory was 40.1 MB in the beginning and 38.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.43 ms. Allocated memory is still 56.6 MB. Free memory was 38.4 MB in the beginning and 37.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 342.42 ms. Allocated memory is still 56.6 MB. Free memory was 37.2 MB in the beginning and 35.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19348.83 ms. Allocated memory was 56.6 MB in the beginning and 146.8 MB in the end (delta: 90.2 MB). Free memory was 34.9 MB in the beginning and 109.4 MB in the end (delta: -74.6 MB). Peak memory consumption was 84.3 MB. Max. memory is 16.1 GB. * Witness Printer took 2.85 ms. Allocated memory is still 146.8 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 2 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i 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 -> 3df2e40dd5334d958c7fe1aacbe2314394082184 [2021-08-25 19:04:59,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 19:04:59,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 19:04:59,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 19:04:59,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 19:04:59,394 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 19:04:59,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn1.c [2021-08-25 19:04:59,460 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf0682aa4/25f9f33396c24131b45059beda6f8903/FLAG43b21ef8c [2021-08-25 19:04:59,803 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 19:04:59,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c [2021-08-25 19:04:59,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf0682aa4/25f9f33396c24131b45059beda6f8903/FLAG43b21ef8c [2021-08-25 19:04:59,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf0682aa4/25f9f33396c24131b45059beda6f8903 [2021-08-25 19:04:59,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 19:04:59,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 19:04:59,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 19:04:59,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 19:04:59,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 19:04:59,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:04:59" (1/1) ... [2021-08-25 19:04:59,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a50c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:04:59, skipping insertion in model container [2021-08-25 19:04:59,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 07:04:59" (1/1) ... [2021-08-25 19:04:59,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 19:04:59,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 19:04:59,968 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c[587,600] [2021-08-25 19:04:59,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:00,008 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 19:05:00,037 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn1.c[587,600] [2021-08-25 19:05:00,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 19:05:00,059 INFO L208 MainTranslator]: Completed translation [2021-08-25 19:05:00,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00 WrapperNode [2021-08-25 19:05:00,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 19:05:00,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:00,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 19:05:00,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 19:05:00,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 19:05:00,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 19:05:00,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 19:05:00,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 19:05:00,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 19:05:00,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 19:05:00,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 19:05:00,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 19:05:00,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (1/1) ... [2021-08-25 19:05:00,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 19:05:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:05:00,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 19:05:00,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 19:05:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-25 19:05:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 19:05:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-08-25 19:05:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-25 19:05:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 19:05:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 19:05:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-08-25 19:05:00,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 19:05:00,544 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-08-25 19:05:00,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:00 BoogieIcfgContainer [2021-08-25 19:05:00,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 19:05:00,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 19:05:00,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 19:05:00,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 19:05:00,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 07:04:59" (1/3) ... [2021-08-25 19:05:00,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f24a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:00, skipping insertion in model container [2021-08-25 19:05:00,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 07:05:00" (2/3) ... [2021-08-25 19:05:00,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60f24a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 07:05:00, skipping insertion in model container [2021-08-25 19:05:00,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:00" (3/3) ... [2021-08-25 19:05:00,550 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn1.c [2021-08-25 19:05:00,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 19:05:00,554 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 19:05:00,583 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 19:05:00,588 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 19:05:00,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 19:05:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:00,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:00,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:00,603 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:00,603 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-08-25 19:05:00,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:00,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616414434] [2021-08-25 19:05:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:00,620 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:00,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:00,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-25 19:05:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:00,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-25 19:05:00,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:00,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:00,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:00,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616414434] [2021-08-25 19:05:00,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616414434] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:00,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:00,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-25 19:05:00,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110512287] [2021-08-25 19:05:00,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 19:05:00,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:00,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 19:05:00,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:05:00,962 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:00,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:00,972 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-08-25 19:05:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 19:05:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:05:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:00,978 INFO L225 Difference]: With dead ends: 38 [2021-08-25 19:05:00,978 INFO L226 Difference]: Without dead ends: 17 [2021-08-25 19:05:00,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 19:05:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-25 19:05:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-25 19:05:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-25 19:05:00,999 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-08-25 19:05:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:00,999 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-25 19:05:01,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-25 19:05:01,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-25 19:05:01,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:01,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:01,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:01,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:01,212 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:01,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-08-25 19:05:01,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:01,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367406507] [2021-08-25 19:05:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:01,214 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:01,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:01,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:01,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-25 19:05:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:01,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:01,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:01,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:01,579 INFO L354 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2021-08-25 19:05:01,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 68 [2021-08-25 19:05:01,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:01,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:01,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:01,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 19:05:01,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 55 [2021-08-25 19:05:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:01,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:02,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:02,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367406507] [2021-08-25 19:05:02,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367406507] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:02,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:02,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-08-25 19:05:02,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128482350] [2021-08-25 19:05:02,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 19:05:02,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 19:05:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-25 19:05:02,732 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:03,773 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-08-25 19:05:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 19:05:03,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-25 19:05:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:03,781 INFO L225 Difference]: With dead ends: 35 [2021-08-25 19:05:03,782 INFO L226 Difference]: Without dead ends: 33 [2021-08-25 19:05:03,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 943.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-25 19:05:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-25 19:05:03,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2021-08-25 19:05:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-25 19:05:03,786 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-08-25 19:05:03,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:03,787 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-25 19:05:03,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-25 19:05:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:03,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:03,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:03,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:03,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:03,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-08-25 19:05:03,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:03,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667116527] [2021-08-25 19:05:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:03,993 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:03,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:03,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-25 19:05:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 19:05:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:04,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:04,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:04,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667116527] [2021-08-25 19:05:04,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667116527] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 19:05:04,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:05:04,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-08-25 19:05:04,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433688233] [2021-08-25 19:05:04,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 19:05:04,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 19:05:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-25 19:05:04,411 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:04,888 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-25 19:05:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:04,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:05:04,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:04,895 INFO L225 Difference]: With dead ends: 43 [2021-08-25 19:05:04,895 INFO L226 Difference]: Without dead ends: 34 [2021-08-25 19:05:04,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:05:04,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-25 19:05:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2021-08-25 19:05:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-08-25 19:05:04,899 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-08-25 19:05:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:04,900 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-08-25 19:05:04,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-08-25 19:05:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-25 19:05:04,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:04,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:04,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-08-25 19:05:05,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:05,104 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-08-25 19:05:05,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:05,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698154985] [2021-08-25 19:05:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:05,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:05,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:05,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:05,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-25 19:05:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:05,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 19:05:05,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:05,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:05,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:05,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698154985] [2021-08-25 19:05:05,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698154985] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:05,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:05,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-25 19:05:05,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385137687] [2021-08-25 19:05:05,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-25 19:05:05,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-25 19:05:05,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-25 19:05:05,692 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:06,521 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-25 19:05:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-25 19:05:06,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-25 19:05:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:06,523 INFO L225 Difference]: With dead ends: 58 [2021-08-25 19:05:06,523 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 19:05:06,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-08-25 19:05:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 19:05:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2021-08-25 19:05:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-25 19:05:06,530 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 14 [2021-08-25 19:05:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:06,530 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-25 19:05:06,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:06,531 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-25 19:05:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:06,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:06,531 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:06,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:06,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:06,741 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-08-25 19:05:06,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:06,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318970882] [2021-08-25 19:05:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:06,742 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:06,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:06,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:06,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-25 19:05:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:06,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 19:05:06,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:07,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:07,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:07,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318970882] [2021-08-25 19:05:07,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318970882] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:07,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:07,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-25 19:05:07,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782710819] [2021-08-25 19:05:07,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 19:05:07,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:07,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 19:05:07,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-25 19:05:07,346 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:07,798 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-08-25 19:05:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 19:05:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:05:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:07,805 INFO L225 Difference]: With dead ends: 41 [2021-08-25 19:05:07,805 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 19:05:07,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-25 19:05:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 19:05:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-08-25 19:05:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-25 19:05:07,808 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-25 19:05:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:07,808 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-25 19:05:07,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-25 19:05:07,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 19:05:07,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:07,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:07,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-25 19:05:08,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:08,013 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-08-25 19:05:08,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:08,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059359793] [2021-08-25 19:05:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:08,014 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:08,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:08,016 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:08,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-25 19:05:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 19:05:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:08,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-08-25 19:05:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:08,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:08,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-25 19:05:08,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:08,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:08,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:08,770 INFO L354 Elim1Store]: treesize reduction 883, result has 10.4 percent of original size [2021-08-25 19:05:08,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 132 treesize of output 141 [2021-08-25 19:05:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:09,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:09,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:09,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:09,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:09,892 INFO L354 Elim1Store]: treesize reduction 1444, result has 3.5 percent of original size [2021-08-25 19:05:09,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 70 case distinctions, treesize of input 290 treesize of output 247 [2021-08-25 19:05:12,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:12,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:12,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:12,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:12,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:12,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:12,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:12,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:12,573 INFO L354 Elim1Store]: treesize reduction 1186, result has 6.2 percent of original size [2021-08-25 19:05:12,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 6 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 353 treesize of output 193 [2021-08-25 19:05:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:12,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:15,835 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 64))) (let ((.cse2 ((_ sign_extend 32) (_ bv0 32))) (.cse7 ((_ sign_extend 32) (_ bv1 32)))) (= (let ((.cse0 (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse3 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base))) (let ((.cse4 (bvmul ((_ extract 31 0) ULTIMATE.start_main_~i~0) (_ bv8 32))) (.cse5 (bvadd (let ((.cse6 (bvmul ((_ extract 31 0) (bvadd (bvneg .cse7) ULTIMATE.start_main_~i~0)) (_ bv8 32)))) (concat (select .cse3 (bvadd .cse6 (_ bv4 32) c_ULTIMATE.start_main_~a~0.offset)) (select .cse3 (bvadd .cse6 c_ULTIMATE.start_main_~a~0.offset)))) ((_ sign_extend 32) (_ bv2 32))))) (store (store .cse3 (bvadd .cse4 c_ULTIMATE.start_main_~a~0.offset) ((_ extract 31 0) .cse5)) (bvadd (_ bv4 32) .cse4 c_ULTIMATE.start_main_~a~0.offset) ((_ extract 63 32) .cse5))))) c_ULTIMATE.start_main_~b~0.base)) (.cse1 (bvmul ((_ extract 31 0) .cse2) (_ bv8 32)))) (concat (select .cse0 (bvadd (_ bv4 32) .cse1 c_ULTIMATE.start_main_~b~0.offset)) (select .cse0 (bvadd .cse1 c_ULTIMATE.start_main_~b~0.offset)))) (bvadd .cse2 (bvmul .cse2 .cse2) .cse7)))) is different from false [2021-08-25 19:05:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-08-25 19:05:15,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:15,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059359793] [2021-08-25 19:05:15,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059359793] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:15,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:15,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-25 19:05:15,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183060087] [2021-08-25 19:05:15,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-25 19:05:15,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:15,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-25 19:05:15,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=102, Unknown=1, NotChecked=20, Total=156 [2021-08-25 19:05:15,874 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:05:35,326 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-08-25 19:05:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-25 19:05:35,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-25 19:05:35,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:05:35,327 INFO L225 Difference]: With dead ends: 68 [2021-08-25 19:05:35,327 INFO L226 Difference]: Without dead ends: 66 [2021-08-25 19:05:35,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 16185.0ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=4, NotChecked=50, Total=756 [2021-08-25 19:05:35,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-25 19:05:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 34. [2021-08-25 19:05:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-25 19:05:35,332 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 16 [2021-08-25 19:05:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:05:35,333 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-25 19:05:35,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:05:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-25 19:05:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:05:35,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:05:35,335 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:05:35,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-08-25 19:05:35,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:05:35,541 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:05:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:05:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-08-25 19:05:35,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:05:35,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614351041] [2021-08-25 19:05:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 19:05:35,542 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:05:35,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:05:35,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:05:35,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-25 19:05:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 19:05:36,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-25 19:05:36,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:05:36,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-08-25 19:05:36,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-25 19:05:36,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,176 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-08-25 19:05:36,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 127 [2021-08-25 19:05:36,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:36,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:36,479 INFO L354 Elim1Store]: treesize reduction 132, result has 15.9 percent of original size [2021-08-25 19:05:36,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 47 case distinctions, treesize of input 278 treesize of output 201 [2021-08-25 19:05:37,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:37,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:37,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:05:37,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:05:37,220 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-08-25 19:05:37,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 355 treesize of output 125 [2021-08-25 19:05:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:37,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 19:05:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 19:05:41,324 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:05:41,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614351041] [2021-08-25 19:05:41,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614351041] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 19:05:41,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 19:05:41,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-25 19:05:41,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869420268] [2021-08-25 19:05:41,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-25 19:05:41,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 19:05:41,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-25 19:05:41,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-25 19:05:41,326 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 19:06:10,593 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-08-25 19:06:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-25 19:06:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-25 19:06:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 19:06:10,595 INFO L225 Difference]: With dead ends: 74 [2021-08-25 19:06:10,595 INFO L226 Difference]: Without dead ends: 72 [2021-08-25 19:06:10,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 14716.4ms TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2021-08-25 19:06:10,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-25 19:06:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2021-08-25 19:06:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-08-25 19:06:10,602 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2021-08-25 19:06:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 19:06:10,602 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-08-25 19:06:10,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 19:06:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-08-25 19:06:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 19:06:10,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 19:06:10,603 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 19:06:10,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-25 19:06:10,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:06:10,813 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 19:06:10,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 19:06:10,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 2 times [2021-08-25 19:06:10,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 19:06:10,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263950239] [2021-08-25 19:06:10,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:06:10,814 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 19:06:10,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 19:06:10,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 19:06:10,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-25 19:06:11,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:06:11,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:06:11,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-25 19:06:11,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:06:11,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-08-25 19:06:11,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:11,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2021-08-25 19:06:11,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-25 19:06:11,578 INFO L354 Elim1Store]: treesize reduction 883, result has 10.4 percent of original size [2021-08-25 19:06:11,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 132 treesize of output 141 [2021-08-25 19:06:11,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:06:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 19:07:18,963 WARN L207 SmtUtils]: Spent 1.12 m on a formula simplification. DAG size of input: 248 DAG size of output: 107 [2021-08-25 19:07:18,964 INFO L354 Elim1Store]: treesize reduction 1328, result has 21.7 percent of original size [2021-08-25 19:07:18,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 237 treesize of output 454 [2021-08-25 19:10:25,593 WARN L224 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-08-25 19:10:25,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 19:10:25,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263950239] [2021-08-25 19:10:25,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-08-25 19:10:25,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1769379750] [2021-08-25 19:10:25,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:10:25,595 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-25 19:10:25,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-25 19:10:25,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-25 19:10:25,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-08-25 19:10:25,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-08-25 19:10:26,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 19:10:26,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987598389] [2021-08-25 19:10:26,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 19:10:26,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 19:10:26,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 19:10:26,311 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 19:10:26,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 1 [2021-08-25 19:10:26,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 19:10:26,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 19:10:26,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 19:10:26,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-25 19:10:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 19:10:26,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-08-25 19:10:26,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 19:10:26,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 19:10:26,633 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-25 19:10:26,633 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 19:10:26,636 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 19:10:26,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-25 19:10:26,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-08-25 19:10:27,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 19:10:27,045 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 19:10:27,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 07:10:27 BoogieIcfgContainer [2021-08-25 19:10:27,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 19:10:27,056 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 19:10:27,056 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 19:10:27,056 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 19:10:27,057 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 07:05:00" (3/4) ... [2021-08-25 19:10:27,059 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 19:10:27,059 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 19:10:27,059 INFO L168 Benchmark]: Toolchain (without parser) took 327230.82 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 37.0 MB in the beginning and 50.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:27,060 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 58.7 MB. Free memory was 40.2 MB in the beginning and 40.1 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:10:27,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.40 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 40.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:27,060 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.90 ms. Allocated memory is still 58.7 MB. Free memory was 40.8 MB in the beginning and 39.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 19:10:27,061 INFO L168 Benchmark]: Boogie Preprocessor took 29.28 ms. Allocated memory is still 58.7 MB. Free memory was 39.0 MB in the beginning and 37.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:27,061 INFO L168 Benchmark]: RCFGBuilder took 421.13 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.7 MB in the beginning and 48.7 MB in the end (delta: -11.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:27,061 INFO L168 Benchmark]: TraceAbstraction took 326509.60 ms. Allocated memory was 71.3 MB in the beginning and 104.9 MB in the end (delta: 33.6 MB). Free memory was 48.2 MB in the beginning and 51.9 MB in the end (delta: -3.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:27,061 INFO L168 Benchmark]: Witness Printer took 2.77 ms. Allocated memory is still 104.9 MB. Free memory was 51.9 MB in the beginning and 50.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 19:10:27,063 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 58.7 MB. Free memory was 40.2 MB in the beginning and 40.1 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.40 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 40.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.90 ms. Allocated memory is still 58.7 MB. Free memory was 40.8 MB in the beginning and 39.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.28 ms. Allocated memory is still 58.7 MB. Free memory was 39.0 MB in the beginning and 37.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 421.13 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 37.7 MB in the beginning and 48.7 MB in the end (delta: -11.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 326509.60 ms. Allocated memory was 71.3 MB in the beginning and 104.9 MB in the end (delta: 33.6 MB). Free memory was 48.2 MB in the beginning and 51.9 MB in the end (delta: -3.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Witness Printer took 2.77 ms. Allocated memory is still 104.9 MB. Free memory was 51.9 MB in the beginning and 50.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 2 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i