./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/simple-ext_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/simple-ext_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:34:03,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:34:03,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:34:03,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:34:03,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:34:03,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:34:03,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:34:03,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:34:03,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:34:03,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:34:03,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:34:03,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:34:03,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:34:03,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:34:03,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:34:03,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:34:03,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:34:03,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:34:03,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:34:03,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:34:03,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:34:03,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:34:03,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:34:03,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:34:03,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:34:03,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:34:03,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:34:03,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:34:03,668 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:34:03,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:34:03,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:34:03,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:34:03,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:34:03,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:34:03,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:34:03,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:34:03,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:34:03,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:34:03,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:34:03,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:34:03,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:34:03,677 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:34:03,710 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:34:03,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:34:03,711 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:34:03,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:34:03,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:34:03,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:34:03,713 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:34:03,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:34:03,713 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:34:03,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:34:03,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:34:03,715 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:34:03,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:34:03,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:34:03,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:34:03,715 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:34:03,716 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:34:03,716 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:34:03,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:34:03,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:34:03,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:34:03,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:34:03,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:34:03,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:34:03,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:34:03,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:34:03,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:34:03,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:34:03,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:34:03,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:34:03,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:34:03,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf7f5d5a0c627430d9132d0f1be3b1c0ad58f22e7924c03137596c145de85b8c [2021-12-22 16:34:03,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:34:03,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:34:03,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:34:03,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:34:03,997 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:34:03,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2021-12-22 16:34:04,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12c9eed6/4a80c6384d1242daaeb11c7c27f39878/FLAGe7c6a1d76 [2021-12-22 16:34:04,509 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:34:04,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/simple-ext_1.i [2021-12-22 16:34:04,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12c9eed6/4a80c6384d1242daaeb11c7c27f39878/FLAGe7c6a1d76 [2021-12-22 16:34:04,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e12c9eed6/4a80c6384d1242daaeb11c7c27f39878 [2021-12-22 16:34:04,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:34:04,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:34:04,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:34:04,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:34:04,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:34:04,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:34:04" (1/1) ... [2021-12-22 16:34:04,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f9ad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:04, skipping insertion in model container [2021-12-22 16:34:04,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:34:04" (1/1) ... [2021-12-22 16:34:04,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:34:04,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:34:04,936 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/list-ext-properties/simple-ext_1.i[23274,23287] [2021-12-22 16:34:04,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:34:04,953 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:34:05,000 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/list-ext-properties/simple-ext_1.i[23274,23287] [2021-12-22 16:34:05,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:34:05,032 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:34:05,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05 WrapperNode [2021-12-22 16:34:05,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:34:05,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:34:05,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:34:05,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:34:05,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,093 INFO L137 Inliner]: procedures = 124, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2021-12-22 16:34:05,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:34:05,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:34:05,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:34:05,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:34:05,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:34:05,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:34:05,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:34:05,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:34:05,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (1/1) ... [2021-12-22 16:34:05,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:34:05,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:05,189 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) [2021-12-22 16:34:05,203 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 [2021-12-22 16:34:05,232 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-22 16:34:05,232 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-22 16:34:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:34:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 16:34:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:34:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:34:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 16:34:05,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:34:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:34:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:34:05,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:34:05,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:34:05,351 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:34:05,365 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:34:05,411 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-22 16:34:05,604 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:34:05,609 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:34:05,613 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 16:34:05,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:34:05 BoogieIcfgContainer [2021-12-22 16:34:05,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:34:05,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:34:05,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:34:05,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:34:05,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:34:04" (1/3) ... [2021-12-22 16:34:05,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694394be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:34:05, skipping insertion in model container [2021-12-22 16:34:05,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:34:05" (2/3) ... [2021-12-22 16:34:05,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694394be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:34:05, skipping insertion in model container [2021-12-22 16:34:05,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:34:05" (3/3) ... [2021-12-22 16:34:05,623 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-ext_1.i [2021-12-22 16:34:05,630 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:34:05,630 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-12-22 16:34:05,674 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:34:05,681 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-22 16:34:05,681 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-12-22 16:34:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 34 states have (on average 1.911764705882353) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:34:05,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:05,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:34:05,707 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1037517416, now seen corresponding path program 1 times [2021-12-22 16:34:05,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:05,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455314910] [2021-12-22 16:34:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:05,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:05,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:05,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455314910] [2021-12-22 16:34:05,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455314910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:05,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:05,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:34:05,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460338867] [2021-12-22 16:34:05,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:05,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 16:34:05,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 16:34:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:34:05,862 INFO L87 Difference]: Start difference. First operand has 58 states, 34 states have (on average 1.911764705882353) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:05,876 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-12-22 16:34:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 16:34:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:34:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:05,883 INFO L225 Difference]: With dead ends: 58 [2021-12-22 16:34:05,884 INFO L226 Difference]: Without dead ends: 52 [2021-12-22 16:34:05,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 16:34:05,888 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:05,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-22 16:34:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-22 16:34:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-12-22 16:34:05,916 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 6 [2021-12-22 16:34:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:05,917 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-12-22 16:34:05,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-12-22 16:34:05,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 16:34:05,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:05,918 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:05,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:34:05,919 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 620871745, now seen corresponding path program 1 times [2021-12-22 16:34:05,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:05,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503857157] [2021-12-22 16:34:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:05,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:05,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:05,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503857157] [2021-12-22 16:34:05,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503857157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:05,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:05,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:05,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890110466] [2021-12-22 16:34:05,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:05,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:05,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:05,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:05,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:06,000 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:06,108 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-12-22 16:34:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:34:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 16:34:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:06,109 INFO L225 Difference]: With dead ends: 70 [2021-12-22 16:34:06,109 INFO L226 Difference]: Without dead ends: 70 [2021-12-22 16:34:06,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:34:06,111 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:06,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 31 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:06,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-22 16:34:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2021-12-22 16:34:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.675) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-12-22 16:34:06,118 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 8 [2021-12-22 16:34:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:06,119 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-12-22 16:34:06,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-12-22 16:34:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 16:34:06,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:06,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:06,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:34:06,120 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:06,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash 620871746, now seen corresponding path program 1 times [2021-12-22 16:34:06,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:06,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385641600] [2021-12-22 16:34:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:06,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:06,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:06,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385641600] [2021-12-22 16:34:06,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385641600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:06,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:06,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:06,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079050985] [2021-12-22 16:34:06,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:06,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:06,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:06,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:06,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:06,182 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:06,327 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-12-22 16:34:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:34:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 16:34:06,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:06,328 INFO L225 Difference]: With dead ends: 77 [2021-12-22 16:34:06,328 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 16:34:06,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:34:06,336 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:06,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 33 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:06,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 16:34:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2021-12-22 16:34:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.489795918367347) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-22 16:34:06,353 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 8 [2021-12-22 16:34:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:06,354 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-22 16:34:06,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,354 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-22 16:34:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 16:34:06,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:06,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:06,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 16:34:06,356 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash -382774458, now seen corresponding path program 1 times [2021-12-22 16:34:06,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:06,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644236726] [2021-12-22 16:34:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:06,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:06,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:06,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644236726] [2021-12-22 16:34:06,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644236726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:06,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:06,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 16:34:06,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880465503] [2021-12-22 16:34:06,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:06,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:34:06,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:34:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:34:06,474 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:06,720 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2021-12-22 16:34:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:34:06,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-22 16:34:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:06,726 INFO L225 Difference]: With dead ends: 140 [2021-12-22 16:34:06,726 INFO L226 Difference]: Without dead ends: 140 [2021-12-22 16:34:06,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:34:06,735 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:06,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 127 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:34:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-22 16:34:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 69. [2021-12-22 16:34:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.471698113207547) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-12-22 16:34:06,745 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2021-12-22 16:34:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:06,746 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-12-22 16:34:06,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-12-22 16:34:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 16:34:06,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:06,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:06,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:34:06,747 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:06,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1017634056, now seen corresponding path program 1 times [2021-12-22 16:34:06,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:06,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828563724] [2021-12-22 16:34:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:06,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:06,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:06,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828563724] [2021-12-22 16:34:06,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828563724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:06,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:06,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:34:06,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668314644] [2021-12-22 16:34:06,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:06,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:06,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:06,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:06,799 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:06,857 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-12-22 16:34:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:34:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-22 16:34:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:06,858 INFO L225 Difference]: With dead ends: 76 [2021-12-22 16:34:06,859 INFO L226 Difference]: Without dead ends: 76 [2021-12-22 16:34:06,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:34:06,864 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:06,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-22 16:34:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2021-12-22 16:34:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-12-22 16:34:06,882 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2021-12-22 16:34:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:06,883 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-12-22 16:34:06,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-12-22 16:34:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:34:06,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:06,888 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:06,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 16:34:06,889 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:06,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash -90857936, now seen corresponding path program 1 times [2021-12-22 16:34:06,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:06,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444317254] [2021-12-22 16:34:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:06,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:07,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444317254] [2021-12-22 16:34:07,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444317254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:07,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894813147] [2021-12-22 16:34:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:07,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:07,079 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) [2021-12-22 16:34:07,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:34:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:07,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 16:34:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:07,324 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 11 treesize of output 7 [2021-12-22 16:34:07,334 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 11 treesize of output 7 [2021-12-22 16:34:07,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 16:34:07,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 16:34:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:07,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:07,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2021-12-22 16:34:07,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-12-22 16:34:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:07,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894813147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:07,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:07,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 16 [2021-12-22 16:34:07,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354515866] [2021-12-22 16:34:07,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:07,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 16:34:07,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 16:34:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:34:07,879 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:08,132 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-12-22 16:34:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:34:08,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 16:34:08,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:08,133 INFO L225 Difference]: With dead ends: 100 [2021-12-22 16:34:08,133 INFO L226 Difference]: Without dead ends: 100 [2021-12-22 16:34:08,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-12-22 16:34:08,134 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 195 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:08,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 169 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 240 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2021-12-22 16:34:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-22 16:34:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2021-12-22 16:34:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-12-22 16:34:08,140 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 17 [2021-12-22 16:34:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:08,140 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-12-22 16:34:08,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-12-22 16:34:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:34:08,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:08,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:08,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:08,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 16:34:08,360 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1332204603, now seen corresponding path program 1 times [2021-12-22 16:34:08,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:08,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195506040] [2021-12-22 16:34:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:08,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:08,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195506040] [2021-12-22 16:34:08,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195506040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:08,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:08,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:34:08,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355668789] [2021-12-22 16:34:08,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:08,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:34:08,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:34:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:34:08,451 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:08,565 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-12-22 16:34:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:34:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 16:34:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:08,566 INFO L225 Difference]: With dead ends: 74 [2021-12-22 16:34:08,566 INFO L226 Difference]: Without dead ends: 74 [2021-12-22 16:34:08,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:34:08,567 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 53 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:08,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 123 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-22 16:34:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-12-22 16:34:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-12-22 16:34:08,572 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 17 [2021-12-22 16:34:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:08,572 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-12-22 16:34:08,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-12-22 16:34:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 16:34:08,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:08,573 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:08,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 16:34:08,573 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:08,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1332204604, now seen corresponding path program 1 times [2021-12-22 16:34:08,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:08,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342905475] [2021-12-22 16:34:08,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:08,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:08,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:08,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342905475] [2021-12-22 16:34:08,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342905475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:08,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:08,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 16:34:08,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125954118] [2021-12-22 16:34:08,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:08,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:34:08,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:34:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:34:08,665 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:08,833 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-12-22 16:34:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:34:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-22 16:34:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:08,834 INFO L225 Difference]: With dead ends: 70 [2021-12-22 16:34:08,834 INFO L226 Difference]: Without dead ends: 70 [2021-12-22 16:34:08,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:34:08,835 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 34 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:08,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 144 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:34:08,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-22 16:34:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2021-12-22 16:34:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-12-22 16:34:08,840 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 17 [2021-12-22 16:34:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:08,840 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-12-22 16:34:08,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-12-22 16:34:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 16:34:08,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:08,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:08,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 16:34:08,842 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash 76906689, now seen corresponding path program 1 times [2021-12-22 16:34:08,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:08,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482924521] [2021-12-22 16:34:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:08,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:34:08,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482924521] [2021-12-22 16:34:08,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482924521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:34:08,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:34:08,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:34:08,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796810059] [2021-12-22 16:34:08,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:34:08,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:34:08,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:34:08,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:34:08,883 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:08,929 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-12-22 16:34:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:34:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 16:34:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:08,931 INFO L225 Difference]: With dead ends: 70 [2021-12-22 16:34:08,931 INFO L226 Difference]: Without dead ends: 70 [2021-12-22 16:34:08,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:34:08,932 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:08,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 39 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:34:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-22 16:34:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2021-12-22 16:34:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2021-12-22 16:34:08,936 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 22 [2021-12-22 16:34:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:08,936 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2021-12-22 16:34:08,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2021-12-22 16:34:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 16:34:08,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:08,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:08,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 16:34:08,938 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:08,939 INFO L85 PathProgramCache]: Analyzing trace with hash -296680512, now seen corresponding path program 1 times [2021-12-22 16:34:08,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:08,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102971159] [2021-12-22 16:34:08,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:08,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:09,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:09,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102971159] [2021-12-22 16:34:09,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102971159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:09,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703446648] [2021-12-22 16:34:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:09,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:09,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:09,081 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) [2021-12-22 16:34:09,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:34:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:09,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-22 16:34:09,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:09,235 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 11 treesize of output 7 [2021-12-22 16:34:09,276 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:34:09,276 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 [2021-12-22 16:34:09,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:34:09,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:09,347 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 21 treesize of output 20 [2021-12-22 16:34:09,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-22 16:34:09,459 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 14 treesize of output 16 [2021-12-22 16:34:09,474 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 14 treesize of output 16 [2021-12-22 16:34:09,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:09,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:09,529 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 15 treesize of output 10 [2021-12-22 16:34:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:09,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:09,635 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_176 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_35| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_176) |c_ULTIMATE.start_main_~a~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_35|) 0) (not (<= |v_ULTIMATE.start_main_~p~0#1.offset_35| |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_35|)))) is different from false [2021-12-22 16:34:09,703 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_176 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_35| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~mem7#1.base| v_ArrVal_176) |c_ULTIMATE.start_main_~a~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_35|) 0) (not (<= |v_ULTIMATE.start_main_~p~0#1.offset_35| |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_35|)))) is different from false [2021-12-22 16:34:09,719 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_176 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_35| Int)) (or (not (<= |v_ULTIMATE.start_main_~p~0#1.offset_35| |c_ULTIMATE.start_main_~a~0#1.offset|)) (= (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) v_ArrVal_176) |c_ULTIMATE.start_main_~a~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_35|) 0) (not (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_35|)))) is different from false [2021-12-22 16:34:09,753 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_171 Int) (v_ArrVal_176 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_35| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_ArrVal_171)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_176) |c_ULTIMATE.start_main_~a~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_35|) 0) (not (<= |v_ULTIMATE.start_main_~p~0#1.offset_35| |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_35|)))) is different from false [2021-12-22 16:34:09,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:09,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:09,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-12-22 16:34:09,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:09,914 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 30 treesize of output 33 [2021-12-22 16:34:09,919 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 9 treesize of output 7 [2021-12-22 16:34:09,930 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 16:34:09,931 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 13 treesize of output 12 [2021-12-22 16:34:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-22 16:34:10,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703446648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:10,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:10,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2021-12-22 16:34:10,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883552832] [2021-12-22 16:34:10,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:10,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-22 16:34:10,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-22 16:34:10,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=557, Unknown=4, NotChecked=204, Total=870 [2021-12-22 16:34:10,124 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:10,507 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~p~0#1.offset|))) (and (forall ((v_ArrVal_171 Int) (v_ArrVal_176 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_35| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_ArrVal_171)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_176) |c_ULTIMATE.start_main_~a~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_35|) 0) (not (<= |v_ULTIMATE.start_main_~p~0#1.offset_35| |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_35|)))) (= (select |c_#valid| |c_ULTIMATE.start_main_~p~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= |c_ULTIMATE.start_main_~p~0#1.offset| |c_ULTIMATE.start_main_~a~0#1.offset|) (<= |c_ULTIMATE.start_main_~p~0#1.offset| 0) (= (select .cse0 0) 0) (= .cse1 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= .cse1 0) (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)))) is different from false [2021-12-22 16:34:10,821 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_171 Int) (v_ArrVal_176 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_35| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_ArrVal_171)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_176) |c_ULTIMATE.start_main_~a~0#1.base|) |v_ULTIMATE.start_main_~p~0#1.offset_35|) 0) (not (<= |v_ULTIMATE.start_main_~p~0#1.offset_35| |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_35|)))) (not (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~t~0#1.base|)) (= |c_ULTIMATE.start_main_~p~0#1.offset| |c_ULTIMATE.start_main_~a~0#1.offset|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~p~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) is different from false [2021-12-22 16:34:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:11,246 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-12-22 16:34:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-22 16:34:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-22 16:34:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:11,248 INFO L225 Difference]: With dead ends: 121 [2021-12-22 16:34:11,248 INFO L226 Difference]: Without dead ends: 121 [2021-12-22 16:34:11,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=208, Invalid=866, Unknown=6, NotChecked=402, Total=1482 [2021-12-22 16:34:11,249 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 115 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:11,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 378 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 473 Invalid, 0 Unknown, 335 Unchecked, 0.3s Time] [2021-12-22 16:34:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-22 16:34:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-12-22 16:34:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 75 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2021-12-22 16:34:11,252 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 23 [2021-12-22 16:34:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:11,252 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2021-12-22 16:34:11,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2021-12-22 16:34:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:34:11,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:11,262 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:11,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:11,463 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,SelfDestructingSolverStorable9 [2021-12-22 16:34:11,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:11,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1909738955, now seen corresponding path program 1 times [2021-12-22 16:34:11,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:11,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687547520] [2021-12-22 16:34:11,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:11,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:34:11,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687547520] [2021-12-22 16:34:11,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687547520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086805403] [2021-12-22 16:34:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:11,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:11,615 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) [2021-12-22 16:34:11,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:34:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:11,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-22 16:34:11,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:11,774 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 13 treesize of output 9 [2021-12-22 16:34:11,777 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 13 treesize of output 9 [2021-12-22 16:34:11,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:11,939 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 19 treesize of output 19 [2021-12-22 16:34:11,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:11,947 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 19 treesize of output 19 [2021-12-22 16:34:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:34:12,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:12,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2021-12-22 16:34:12,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-12-22 16:34:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:34:12,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086805403] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:12,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:12,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2021-12-22 16:34:12,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055276781] [2021-12-22 16:34:12,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:12,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 16:34:12,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 16:34:12,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:34:12,434 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:12,676 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2021-12-22 16:34:12,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:34:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-22 16:34:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:12,677 INFO L225 Difference]: With dead ends: 91 [2021-12-22 16:34:12,677 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 16:34:12,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-12-22 16:34:12,678 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:12,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 181 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 178 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-22 16:34:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 16:34:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2021-12-22 16:34:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 83 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-12-22 16:34:12,681 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 25 [2021-12-22 16:34:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:12,681 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-12-22 16:34:12,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:12,682 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-12-22 16:34:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:34:12,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:12,682 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 16:34:12,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:12,883 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash -927635976, now seen corresponding path program 1 times [2021-12-22 16:34:12,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:12,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758491462] [2021-12-22 16:34:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:12,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:34:12,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758491462] [2021-12-22 16:34:12,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758491462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:12,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595371112] [2021-12-22 16:34:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:12,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:12,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:12,945 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) [2021-12-22 16:34:12,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:34:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:13,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:34:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:13,070 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 13 treesize of output 9 [2021-12-22 16:34:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:34:13,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:34:13,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595371112] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:13,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:13,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-12-22 16:34:13,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712062150] [2021-12-22 16:34:13,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:13,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:34:13,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:34:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:34:13,139 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:13,210 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-12-22 16:34:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:34:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 16:34:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:13,212 INFO L225 Difference]: With dead ends: 86 [2021-12-22 16:34:13,212 INFO L226 Difference]: Without dead ends: 67 [2021-12-22 16:34:13,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 16:34:13,213 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:13,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-12-22 16:34:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-22 16:34:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-22 16:34:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-12-22 16:34:13,215 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 26 [2021-12-22 16:34:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:13,216 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-12-22 16:34:13,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-12-22 16:34:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:34:13,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:13,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:13,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:13,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:13,431 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 638411638, now seen corresponding path program 1 times [2021-12-22 16:34:13,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:13,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145088947] [2021-12-22 16:34:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:13,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:13,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145088947] [2021-12-22 16:34:13,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145088947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:13,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360758286] [2021-12-22 16:34:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:13,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:13,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:13,641 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) [2021-12-22 16:34:13,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:34:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-22 16:34:13,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:13,802 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:34:13,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:34:13,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:34:14,007 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:14,007 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 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-22 16:34:14,031 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:14,032 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2021-12-22 16:34:14,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:14,137 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-12-22 16:34:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:14,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:14,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:14,451 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-22 16:34:14,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:14,459 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 40 treesize of output 43 [2021-12-22 16:34:14,464 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 13 treesize of output 9 [2021-12-22 16:34:14,984 INFO L353 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2021-12-22 16:34:14,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 67 [2021-12-22 16:34:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:15,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360758286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:15,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:15,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2021-12-22 16:34:15,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765774410] [2021-12-22 16:34:15,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:15,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-22 16:34:15,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-22 16:34:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=949, Unknown=5, NotChecked=0, Total=1122 [2021-12-22 16:34:15,220 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:15,624 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-12-22 16:34:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 16:34:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 16:34:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:15,625 INFO L225 Difference]: With dead ends: 118 [2021-12-22 16:34:15,626 INFO L226 Difference]: Without dead ends: 118 [2021-12-22 16:34:15,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=1266, Unknown=5, NotChecked=0, Total=1560 [2021-12-22 16:34:15,626 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 262 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:15,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 361 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 463 Invalid, 0 Unknown, 312 Unchecked, 0.2s Time] [2021-12-22 16:34:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-22 16:34:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2021-12-22 16:34:15,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-12-22 16:34:15,629 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 26 [2021-12-22 16:34:15,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:15,629 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-12-22 16:34:15,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:15,629 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-12-22 16:34:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 16:34:15,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:15,630 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:15,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:15,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 16:34:15,831 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:15,832 INFO L85 PathProgramCache]: Analyzing trace with hash 638411639, now seen corresponding path program 1 times [2021-12-22 16:34:15,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:15,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943774047] [2021-12-22 16:34:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:15,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:16,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:16,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943774047] [2021-12-22 16:34:16,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943774047] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:16,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116780211] [2021-12-22 16:34:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:16,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:16,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:16,047 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) [2021-12-22 16:34:16,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:34:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-22 16:34:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:16,212 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 [2021-12-22 16:34:16,224 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:34:16,225 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 [2021-12-22 16:34:16,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:34:16,278 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 13 treesize of output 9 [2021-12-22 16:34:16,409 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:16,410 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 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-22 16:34:16,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:34:16,419 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 14 treesize of output 16 [2021-12-22 16:34:16,439 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:16,439 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-12-22 16:34:16,443 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 18 treesize of output 20 [2021-12-22 16:34:16,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:16,554 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-22 16:34:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:16,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:16,559 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 27 treesize of output 16 [2021-12-22 16:34:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:16,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:17,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:17,140 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-12-22 16:34:17,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:17,146 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 59 [2021-12-22 16:34:17,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:17,164 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 86 treesize of output 89 [2021-12-22 16:34:17,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:17,175 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 143 treesize of output 134 [2021-12-22 16:34:17,184 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 95 treesize of output 87 [2021-12-22 16:34:17,189 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 87 treesize of output 79 [2021-12-22 16:34:17,193 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 79 treesize of output 75 [2021-12-22 16:34:17,490 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 16:34:17,491 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 13 treesize of output 12 [2021-12-22 16:34:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:17,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116780211] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:17,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:17,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2021-12-22 16:34:17,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995806295] [2021-12-22 16:34:17,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:17,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-22 16:34:17,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-22 16:34:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1018, Unknown=11, NotChecked=0, Total=1190 [2021-12-22 16:34:17,613 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:18,481 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-12-22 16:34:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 16:34:18,481 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-22 16:34:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:18,482 INFO L225 Difference]: With dead ends: 122 [2021-12-22 16:34:18,482 INFO L226 Difference]: Without dead ends: 122 [2021-12-22 16:34:18,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=462, Invalid=2179, Unknown=11, NotChecked=0, Total=2652 [2021-12-22 16:34:18,484 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 387 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:18,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 367 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 634 Invalid, 0 Unknown, 300 Unchecked, 0.3s Time] [2021-12-22 16:34:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-22 16:34:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 70. [2021-12-22 16:34:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.278688524590164) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-12-22 16:34:18,486 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 26 [2021-12-22 16:34:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:18,486 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-12-22 16:34:18,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-12-22 16:34:18,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 16:34:18,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:18,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:18,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:18,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:18,699 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -666737801, now seen corresponding path program 1 times [2021-12-22 16:34:18,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:18,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755195451] [2021-12-22 16:34:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:18,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:19,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755195451] [2021-12-22 16:34:19,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755195451] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:19,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528319598] [2021-12-22 16:34:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:19,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:19,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:19,050 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) [2021-12-22 16:34:19,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:34:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-22 16:34:19,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:19,211 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:34:19,212 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 [2021-12-22 16:34:19,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:34:19,249 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 13 treesize of output 9 [2021-12-22 16:34:19,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-22 16:34:19,361 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 14 treesize of output 16 [2021-12-22 16:34:19,371 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 14 treesize of output 16 [2021-12-22 16:34:19,398 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:19,398 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2021-12-22 16:34:19,402 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 18 treesize of output 20 [2021-12-22 16:34:19,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-12-22 16:34:19,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:19,538 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-22 16:34:19,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:19,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:19,548 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 29 treesize of output 18 [2021-12-22 16:34:19,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 16:34:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:19,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:19,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_435 (Array Int Int)) (|v_ULTIMATE.start_main_~p~0#1.offset_67| Int) (v_ArrVal_433 (Array Int Int))) (or (not (<= 0 |v_ULTIMATE.start_main_~p~0#1.offset_67|)) (not (<= |v_ULTIMATE.start_main_~p~0#1.offset_67| |c_ULTIMATE.start_main_~a~0#1.offset|)) (= (let ((.cse0 (+ |v_ULTIMATE.start_main_~p~0#1.offset_67| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4) v_ArrVal_434)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_435) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_433) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) 1))) is different from false [2021-12-22 16:34:19,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 182 [2021-12-22 16:34:20,897 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:20,897 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 140 [2021-12-22 16:34:20,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:20,904 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 120 [2021-12-22 16:34:20,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:20,917 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 180 treesize of output 165 [2021-12-22 16:34:20,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:20,927 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 208 treesize of output 199 [2021-12-22 16:34:20,935 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 160 treesize of output 156 [2021-12-22 16:34:20,940 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 156 treesize of output 152 [2021-12-22 16:34:20,945 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 152 treesize of output 144 [2021-12-22 16:34:20,950 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 144 treesize of output 140 [2021-12-22 16:34:20,955 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 140 treesize of output 136 [2021-12-22 16:34:20,960 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 136 treesize of output 132 [2021-12-22 16:34:21,258 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 16:34:21,258 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 13 treesize of output 12 [2021-12-22 16:34:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:21,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528319598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:34:21,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:34:21,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 33 [2021-12-22 16:34:21,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091248727] [2021-12-22 16:34:21,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:34:21,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-22 16:34:21,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:34:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-22 16:34:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=878, Unknown=1, NotChecked=60, Total=1056 [2021-12-22 16:34:21,411 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:36,964 WARN L227 SmtUtils]: Spent 15.27s on a formula simplification. DAG size of input: 52 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-22 16:34:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:34:37,500 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-12-22 16:34:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 16:34:37,501 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-22 16:34:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:34:37,501 INFO L225 Difference]: With dead ends: 115 [2021-12-22 16:34:37,502 INFO L226 Difference]: Without dead ends: 115 [2021-12-22 16:34:37,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=297, Invalid=1598, Unknown=1, NotChecked=84, Total=1980 [2021-12-22 16:34:37,503 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:34:37,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 498 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 798 Invalid, 0 Unknown, 263 Unchecked, 0.4s Time] [2021-12-22 16:34:37,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-22 16:34:37,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 72. [2021-12-22 16:34:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-12-22 16:34:37,505 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 28 [2021-12-22 16:34:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:34:37,505 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-12-22 16:34:37,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:34:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-12-22 16:34:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 16:34:37,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:34:37,506 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:34:37,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:34:37,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:37,716 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-12-22 16:34:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:34:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1442763871, now seen corresponding path program 2 times [2021-12-22 16:34:37,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:34:37,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279244021] [2021-12-22 16:34:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:34:37,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:34:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:34:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:38,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:34:38,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279244021] [2021-12-22 16:34:38,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279244021] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:34:38,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420558790] [2021-12-22 16:34:38,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:34:38,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:34:38,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:34:38,011 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) [2021-12-22 16:34:38,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:34:38,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:34:38,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:34:38,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-22 16:34:38,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:34:38,180 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:34:38,181 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 [2021-12-22 16:34:38,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-22 16:34:38,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-22 16:34:38,251 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 13 treesize of output 9 [2021-12-22 16:34:38,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-22 16:34:38,384 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-22 16:34:38,385 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 1 case distinctions, treesize of input 31 treesize of output 29 [2021-12-22 16:34:38,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:38,434 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-22 16:34:38,434 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 42 [2021-12-22 16:34:38,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-22 16:34:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:38,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:38,996 INFO L353 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-12-22 16:34:38,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 53 [2021-12-22 16:34:39,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-22 16:34:39,002 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-22 16:34:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:34:39,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:34:39,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2021-12-22 16:34:40,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:40,712 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2021-12-22 16:34:43,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:43,003 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 73 [2021-12-22 16:34:43,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:43,012 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 134 treesize of output 119 [2021-12-22 16:34:43,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:34:43,023 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 108 treesize of output 100