./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/verifythis/prefixsum_rec.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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:20:59,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:20:59,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:20:59,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:20:59,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:20:59,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:20:59,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:20:59,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:20:59,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:20:59,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:20:59,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:20:59,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:20:59,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:20:59,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:20:59,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:20:59,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:20:59,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:20:59,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:20:59,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:20:59,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:20:59,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:20:59,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:20:59,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:20:59,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:20:59,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:20:59,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:20:59,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:20:59,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:20:59,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:20:59,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:20:59,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:20:59,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:20:59,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:20:59,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:20:59,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:20:59,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:20:59,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:20:59,805 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:20:59,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:20:59,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:20:59,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:20:59,807 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:20:59,836 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:20:59,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:20:59,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:20:59,837 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:20:59,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:20:59,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:20:59,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:20:59,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:20:59,839 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:20:59,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:20:59,840 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:20:59,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:20:59,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:20:59,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:20:59,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:20:59,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:20:59,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:20:59,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:20:59,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:20:59,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:20:59,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:20:59,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:20:59,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:20:59,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:20:59,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:20:59,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:20:59,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:20:59,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:20:59,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:20:59,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:20:59,845 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:20:59,845 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:20:59,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:20:59,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:20:59,846 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2021-12-21 13:21:00,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:21:00,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:21:00,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:21:00,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:21:00,083 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:21:00,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-12-21 13:21:00,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf05f542/d4b39f6fd49b42ba8629ff28ec75925f/FLAG30cb00c92 [2021-12-21 13:21:00,477 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:21:00,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-12-21 13:21:00,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf05f542/d4b39f6fd49b42ba8629ff28ec75925f/FLAG30cb00c92 [2021-12-21 13:21:00,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cf05f542/d4b39f6fd49b42ba8629ff28ec75925f [2021-12-21 13:21:00,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:21:00,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:21:00,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:21:00,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:21:00,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:21:00,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@727c9278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00, skipping insertion in model container [2021-12-21 13:21:00,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:21:00,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:21:00,644 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-12-21 13:21:00,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:21:00,685 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:21:00,695 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-12-21 13:21:00,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:21:00,718 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:21:00,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00 WrapperNode [2021-12-21 13:21:00,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:21:00,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:21:00,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:21:00,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:21:00,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,766 INFO L137 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2021-12-21 13:21:00,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:21:00,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:21:00,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:21:00,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:21:00,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:21:00,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:21:00,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:21:00,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:21:00,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (1/1) ... [2021-12-21 13:21:00,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:21:00,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:00,815 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) [2021-12-21 13:21:00,816 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 [2021-12-21 13:21:00,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:21:00,847 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 13:21:00,847 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 13:21:00,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:21:00,848 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2021-12-21 13:21:00,848 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2021-12-21 13:21:00,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 13:21:00,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 13:21:00,848 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2021-12-21 13:21:00,848 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2021-12-21 13:21:00,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:21:00,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:21:00,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 13:21:00,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-21 13:21:00,849 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-21 13:21:00,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 13:21:00,930 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:21:00,931 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:21:03,234 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:21:03,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:21:03,244 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 13:21:03,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:03 BoogieIcfgContainer [2021-12-21 13:21:03,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:21:03,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:21:03,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:21:03,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:21:03,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:21:00" (1/3) ... [2021-12-21 13:21:03,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374675c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:21:03, skipping insertion in model container [2021-12-21 13:21:03,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:21:00" (2/3) ... [2021-12-21 13:21:03,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374675c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:21:03, skipping insertion in model container [2021-12-21 13:21:03,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:21:03" (3/3) ... [2021-12-21 13:21:03,259 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2021-12-21 13:21:03,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:21:03,263 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:21:03,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:21:03,312 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-21 13:21:03,312 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:21:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 13:21:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 13:21:03,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:03,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:03,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:03,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:03,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1639330660, now seen corresponding path program 1 times [2021-12-21 13:21:03,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:03,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781402928] [2021-12-21 13:21:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:03,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:03,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:03,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 13:21:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:03,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 13:21:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:03,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 13:21:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:03,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 13:21:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:03,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 13:21:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 13:21:03,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781402928] [2021-12-21 13:21:03,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781402928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:03,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:03,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:21:03,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275898470] [2021-12-21 13:21:03,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:03,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:21:03,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:21:03,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:03,708 INFO L87 Difference]: Start difference. First operand has 49 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 13:21:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:03,798 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2021-12-21 13:21:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:21:03,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-12-21 13:21:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:03,808 INFO L225 Difference]: With dead ends: 96 [2021-12-21 13:21:03,809 INFO L226 Difference]: Without dead ends: 46 [2021-12-21 13:21:03,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:21:03,817 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:03,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-21 13:21:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-21 13:21:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 13:21:03,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2021-12-21 13:21:03,856 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 44 [2021-12-21 13:21:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:03,856 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2021-12-21 13:21:03,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 13:21:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2021-12-21 13:21:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 13:21:03,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:03,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:03,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:21:03,862 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1439199646, now seen corresponding path program 1 times [2021-12-21 13:21:03,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:03,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510412560] [2021-12-21 13:21:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:03,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:04,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:04,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 13:21:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 13:21:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:04,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 13:21:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:04,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-21 13:21:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:04,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 13:21:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 13:21:04,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510412560] [2021-12-21 13:21:04,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510412560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:04,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:04,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:21:04,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907107177] [2021-12-21 13:21:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:04,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:21:04,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:21:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:21:04,157 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 13:21:06,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 13:21:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:06,513 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2021-12-21 13:21:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:21:06,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2021-12-21 13:21:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:06,515 INFO L225 Difference]: With dead ends: 87 [2021-12-21 13:21:06,515 INFO L226 Difference]: Without dead ends: 71 [2021-12-21 13:21:06,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-21 13:21:06,517 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 35 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:06,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 245 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 13:21:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-21 13:21:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2021-12-21 13:21:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 13:21:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-21 13:21:06,527 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 44 [2021-12-21 13:21:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:06,527 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-21 13:21:06,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 13:21:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-21 13:21:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 13:21:06,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:06,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:06,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:21:06,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1012024996, now seen corresponding path program 1 times [2021-12-21 13:21:06,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:06,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615348186] [2021-12-21 13:21:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:06,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:06,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:06,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 13:21:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:06,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 13:21:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:06,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 13:21:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:06,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 13:21:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:06,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 13:21:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:21:06,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:06,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615348186] [2021-12-21 13:21:06,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615348186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:06,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559535556] [2021-12-21 13:21:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:06,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:06,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:06,820 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) [2021-12-21 13:21:06,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:21:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 13:21:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:21:07,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:21:07,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559535556] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:07,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:07,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-21 13:21:07,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37764018] [2021-12-21 13:21:07,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:07,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 13:21:07,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 13:21:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:21:07,396 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-21 13:21:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:07,582 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2021-12-21 13:21:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:21:07,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 46 [2021-12-21 13:21:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:07,584 INFO L225 Difference]: With dead ends: 73 [2021-12-21 13:21:07,584 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 13:21:07,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:07,585 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:07,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 263 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:07,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 13:21:07,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-21 13:21:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-21 13:21:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-21 13:21:07,593 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 46 [2021-12-21 13:21:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:07,594 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-21 13:21:07,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-21 13:21:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-21 13:21:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 13:21:07,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:07,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:07,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:07,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:07,820 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1298139546, now seen corresponding path program 2 times [2021-12-21 13:21:07,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:07,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463967594] [2021-12-21 13:21:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:07,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:08,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:08,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 13:21:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:08,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 13:21:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 13:21:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 13:21:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:08,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 13:21:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:09,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:09,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463967594] [2021-12-21 13:21:09,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463967594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:09,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827535213] [2021-12-21 13:21:09,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 13:21:09,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:09,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:09,149 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) [2021-12-21 13:21:09,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 13:21:09,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 13:21:09,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 13:21:09,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-21 13:21:09,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:09,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 13:21:12,196 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-12-21 13:21:12,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 27 [2021-12-21 13:21:12,468 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-12-21 13:21:12,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-12-21 13:21:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 13:21:12,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:12,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827535213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:12,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 13:21:12,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2021-12-21 13:21:12,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242881896] [2021-12-21 13:21:12,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:12,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 13:21:12,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:12,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 13:21:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=828, Unknown=1, NotChecked=0, Total=930 [2021-12-21 13:21:12,887 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-21 13:21:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:14,887 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-12-21 13:21:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 13:21:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 48 [2021-12-21 13:21:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:14,891 INFO L225 Difference]: With dead ends: 67 [2021-12-21 13:21:14,891 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 13:21:14,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=200, Invalid=1521, Unknown=1, NotChecked=0, Total=1722 [2021-12-21 13:21:14,893 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:14,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 338 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 367 Invalid, 0 Unknown, 110 Unchecked, 0.5s Time] [2021-12-21 13:21:14,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 13:21:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-12-21 13:21:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-21 13:21:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-12-21 13:21:14,901 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 48 [2021-12-21 13:21:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:14,902 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-12-21 13:21:14,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-21 13:21:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-12-21 13:21:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-21 13:21:14,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:14,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:14,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:15,127 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,SelfDestructingSolverStorable3 [2021-12-21 13:21:15,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:15,128 INFO L85 PathProgramCache]: Analyzing trace with hash 736701521, now seen corresponding path program 1 times [2021-12-21 13:21:15,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:15,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46203749] [2021-12-21 13:21:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:15,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 13:21:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 13:21:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 13:21:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 13:21:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 13:21:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:21:15,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:15,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46203749] [2021-12-21 13:21:15,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46203749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:15,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339180965] [2021-12-21 13:21:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:15,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:15,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:15,346 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) [2021-12-21 13:21:15,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 13:21:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-21 13:21:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:15,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 13:21:15,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-12-21 13:21:15,565 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 13:21:15,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 13:21:15,597 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_172 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_172) |c_#memory_int|)) is different from true [2021-12-21 13:21:15,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-21 13:21:15,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-21 13:21:15,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-21 13:21:15,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-21 13:21:15,761 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 13:21:15,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-12-21 13:21:16,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-21 13:21:17,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-12-21 13:21:19,593 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_181 Int)) (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~left| 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 v_ArrVal_181))) |c_#memory_int|)) is different from true [2021-12-21 13:21:19,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 91 [2021-12-21 13:21:32,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2021-12-21 13:21:33,008 INFO L387 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 167 treesize of output 161 [2021-12-21 13:21:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-12-21 13:21:33,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:33,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339180965] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:33,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 13:21:33,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 26] total 33 [2021-12-21 13:21:33,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910879407] [2021-12-21 13:21:33,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:33,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 13:21:33,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:33,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 13:21:33,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1152, Unknown=7, NotChecked=138, Total=1406 [2021-12-21 13:21:33,644 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 33 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 28 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-21 13:21:35,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 13:21:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:37,815 INFO L93 Difference]: Finished difference Result 121 states and 156 transitions. [2021-12-21 13:21:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-21 13:21:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 28 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 52 [2021-12-21 13:21:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:37,817 INFO L225 Difference]: With dead ends: 121 [2021-12-21 13:21:37,818 INFO L226 Difference]: Without dead ends: 93 [2021-12-21 13:21:37,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=310, Invalid=3229, Unknown=9, NotChecked=234, Total=3782 [2021-12-21 13:21:37,819 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:37,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 474 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 491 Invalid, 1 Unknown, 582 Unchecked, 2.6s Time] [2021-12-21 13:21:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-21 13:21:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2021-12-21 13:21:37,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 61 states have internal predecessors, (67), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2021-12-21 13:21:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2021-12-21 13:21:37,832 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 52 [2021-12-21 13:21:37,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:37,833 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2021-12-21 13:21:37,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 28 states have internal predecessors, (65), 7 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-21 13:21:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2021-12-21 13:21:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 13:21:37,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:37,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:37,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:38,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:38,042 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash -362686961, now seen corresponding path program 2 times [2021-12-21 13:21:38,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:38,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903768313] [2021-12-21 13:21:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:38,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 13:21:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 13:21:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 13:21:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:38,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 13:21:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:21:38,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:38,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903768313] [2021-12-21 13:21:38,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903768313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:38,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419825309] [2021-12-21 13:21:38,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 13:21:38,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:38,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:38,175 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) [2021-12-21 13:21:38,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 13:21:38,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 13:21:38,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 13:21:38,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 13:21:38,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:21:38,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:21:38,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419825309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:38,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:38,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2021-12-21 13:21:38,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765614405] [2021-12-21 13:21:38,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:38,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 13:21:38,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 13:21:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:21:38,600 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 13:21:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:38,847 INFO L93 Difference]: Finished difference Result 115 states and 144 transitions. [2021-12-21 13:21:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 13:21:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-12-21 13:21:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:38,848 INFO L225 Difference]: With dead ends: 115 [2021-12-21 13:21:38,849 INFO L226 Difference]: Without dead ends: 95 [2021-12-21 13:21:38,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:21:38,850 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 42 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:38,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 399 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-21 13:21:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2021-12-21 13:21:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 61 states have internal predecessors, (67), 15 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2021-12-21 13:21:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2021-12-21 13:21:38,882 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 54 [2021-12-21 13:21:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:38,883 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2021-12-21 13:21:38,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 3 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 13:21:38,883 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2021-12-21 13:21:38,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 13:21:38,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:38,885 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:38,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 13:21:39,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:39,091 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:39,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1333958502, now seen corresponding path program 1 times [2021-12-21 13:21:39,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:39,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708058855] [2021-12-21 13:21:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:39,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 13:21:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 13:21:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 13:21:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 13:21:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 13:21:39,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:39,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708058855] [2021-12-21 13:21:39,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708058855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:39,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543093947] [2021-12-21 13:21:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:39,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:39,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:39,241 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) [2021-12-21 13:21:39,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 13:21:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 13:21:39,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:21:39,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:21:39,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543093947] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:39,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:39,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 16 [2021-12-21 13:21:39,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286764764] [2021-12-21 13:21:39,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:39,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 13:21:39,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 13:21:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:39,594 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 13:21:41,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 13:21:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:41,941 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-12-21 13:21:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:21:41,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2021-12-21 13:21:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:41,944 INFO L225 Difference]: With dead ends: 127 [2021-12-21 13:21:41,944 INFO L226 Difference]: Without dead ends: 111 [2021-12-21 13:21:41,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-12-21 13:21:41,945 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 64 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:41,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 384 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 202 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 13:21:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-21 13:21:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2021-12-21 13:21:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 16 states have call successors, (16), 5 states have call predecessors, (16), 7 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2021-12-21 13:21:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2021-12-21 13:21:41,958 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 57 [2021-12-21 13:21:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:41,959 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2021-12-21 13:21:41,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 13:21:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2021-12-21 13:21:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 13:21:41,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:41,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:41,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:42,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:42,176 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash 33191180, now seen corresponding path program 1 times [2021-12-21 13:21:42,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:42,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717942232] [2021-12-21 13:21:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:42,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 13:21:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 13:21:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 13:21:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 13:21:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 13:21:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 13:21:42,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:42,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717942232] [2021-12-21 13:21:42,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717942232] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:42,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139756832] [2021-12-21 13:21:42,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:42,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:42,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:42,320 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) [2021-12-21 13:21:42,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 13:21:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 13:21:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 13:21:42,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 13:21:43,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139756832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:43,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:43,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2021-12-21 13:21:43,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819241230] [2021-12-21 13:21:43,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:43,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 13:21:43,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 13:21:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-12-21 13:21:43,166 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-21 13:21:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:43,639 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-12-21 13:21:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 13:21:43,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 59 [2021-12-21 13:21:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:43,641 INFO L225 Difference]: With dead ends: 106 [2021-12-21 13:21:43,641 INFO L226 Difference]: Without dead ends: 95 [2021-12-21 13:21:43,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-12-21 13:21:43,643 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 110 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:43,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 299 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:21:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-21 13:21:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2021-12-21 13:21:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 66 states have (on average 1.121212121212121) internal successors, (74), 67 states have internal predecessors, (74), 17 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (24), 18 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-21 13:21:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2021-12-21 13:21:43,666 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 59 [2021-12-21 13:21:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:43,667 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2021-12-21 13:21:43,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (18), 2 states have call predecessors, (18), 5 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-21 13:21:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2021-12-21 13:21:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:21:43,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:43,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:43,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:43,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:43,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:43,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1099509749, now seen corresponding path program 1 times [2021-12-21 13:21:43,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:43,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579056951] [2021-12-21 13:21:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:43,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:43,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:43,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 13:21:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:43,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 13:21:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:43,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 13:21:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:43,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 13:21:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 13:21:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:21:44,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579056951] [2021-12-21 13:21:44,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579056951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:44,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819769994] [2021-12-21 13:21:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:44,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:44,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:44,063 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) [2021-12-21 13:21:44,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 13:21:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 13:21:44,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:21:44,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 13:21:44,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819769994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:44,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:44,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2021-12-21 13:21:44,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496666364] [2021-12-21 13:21:44,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:44,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 13:21:44,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:44,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 13:21:44,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-12-21 13:21:44,877 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-21 13:21:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:45,086 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2021-12-21 13:21:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:21:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 65 [2021-12-21 13:21:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:45,089 INFO L225 Difference]: With dead ends: 103 [2021-12-21 13:21:45,089 INFO L226 Difference]: Without dead ends: 76 [2021-12-21 13:21:45,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-12-21 13:21:45,090 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:45,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 290 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:21:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-21 13:21:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2021-12-21 13:21:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-21 13:21:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-21 13:21:45,097 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 65 [2021-12-21 13:21:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:45,102 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-21 13:21:45,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 19 states have internal predecessors, (62), 7 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-21 13:21:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-21 13:21:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 13:21:45,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:45,104 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:45,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:45,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:45,315 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:45,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:45,316 INFO L85 PathProgramCache]: Analyzing trace with hash -838921823, now seen corresponding path program 1 times [2021-12-21 13:21:45,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:45,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584571224] [2021-12-21 13:21:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:45,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 13:21:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 13:21:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 13:21:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 13:21:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 13:21:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 13:21:45,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:45,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584571224] [2021-12-21 13:21:45,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584571224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:45,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913358434] [2021-12-21 13:21:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:45,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:45,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:45,440 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) [2021-12-21 13:21:45,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 13:21:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:45,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 13:21:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 13:21:45,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-21 13:21:45,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913358434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:45,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:45,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 13 [2021-12-21 13:21:45,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134780231] [2021-12-21 13:21:45,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:45,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 13:21:45,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 13:21:45,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:21:45,897 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 13:21:46,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:46,036 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-12-21 13:21:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:21:46,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 66 [2021-12-21 13:21:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:46,037 INFO L225 Difference]: With dead ends: 67 [2021-12-21 13:21:46,037 INFO L226 Difference]: Without dead ends: 58 [2021-12-21 13:21:46,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-21 13:21:46,038 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 49 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:46,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 193 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:21:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-21 13:21:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-21 13:21:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2021-12-21 13:21:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-21 13:21:46,045 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 66 [2021-12-21 13:21:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:46,046 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-21 13:21:46,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 13:21:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-21 13:21:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 13:21:46,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:46,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:46,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:46,259 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,SelfDestructingSolverStorable9 [2021-12-21 13:21:46,259 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:46,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:46,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1124650442, now seen corresponding path program 1 times [2021-12-21 13:21:46,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:46,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709493976] [2021-12-21 13:21:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:46,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 13:21:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 13:21:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 13:21:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 13:21:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 13:21:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 13:21:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 13:21:46,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:46,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709493976] [2021-12-21 13:21:46,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709493976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:46,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175284405] [2021-12-21 13:21:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:46,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:46,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:46,566 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) [2021-12-21 13:21:46,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 13:21:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:46,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 170 conjunts are in the unsatisfiable core [2021-12-21 13:21:46,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:46,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 13:21:46,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-12-21 13:21:46,874 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 13:21:46,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 13:21:46,912 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_545 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_545) |c_#memory_int|)) is different from true [2021-12-21 13:21:46,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-21 13:21:46,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-21 13:21:47,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-21 13:21:47,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-21 13:21:51,738 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_552 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_upsweep_#in~a.base| (store (select |c_old(#memory_int)| |c_upsweep_#in~a.base|) (+ (* |c_upsweep_#in~right| 4) |c_upsweep_#in~a.offset|) v_ArrVal_552)))) is different from true [2021-12-21 13:22:03,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2021-12-21 13:22:03,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 40 [2021-12-21 13:22:07,612 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int) (v_ArrVal_561 Int)) (and (= (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 v_ArrVal_561))) |c_#memory_int|) (<= downsweep_~left |c_downsweep_#in~left|))) is different from true